diff --git a/apps/bff/src/integrations/freebit/facades/freebit.facade.ts b/apps/bff/src/integrations/freebit/facades/freebit.facade.ts
index ac3b47e7..9ee158b4 100644
--- a/apps/bff/src/integrations/freebit/facades/freebit.facade.ts
+++ b/apps/bff/src/integrations/freebit/facades/freebit.facade.ts
@@ -208,14 +208,11 @@ export class FreebitFacade {
   // ============================================================================
 
   /**
-   * Register a semi-black SIM account (PA05-18)
+   * Register a semi-black SIM account (PA05-19)
    *
-   * This MUST be called BEFORE PA02-01 for physical SIMs.
+   * For MNP transfers on physical SIMs, this replaces PA02-01.
    * Semi-black SIMs are pre-provisioned physical SIMs that need to be registered
    * to associate them with a customer account and plan.
-   *
-   * Error 210 "アカウント不在エラー" on PA02-01 indicates that PA05-18
-   * was not called first.
    */
   async registerSemiBlackAccount(params: {
     account: string;
diff --git a/apps/bff/src/integrations/freebit/interfaces/freebit.types.ts b/apps/bff/src/integrations/freebit/interfaces/freebit.types.ts
index bf1a40c5..6ea96865 100644
--- a/apps/bff/src/integrations/freebit/interfaces/freebit.types.ts
+++ b/apps/bff/src/integrations/freebit/interfaces/freebit.types.ts
@@ -319,15 +319,15 @@ export interface FreebitEsimAccountActivationRequest {
   oldEid?: string; // Row 14: 元eSIM識別番号 (Conditional - for exchange)
   mnp?: {
     // Row 15: MNP情報 (Conditional)
-    reserveNumber: string; // Row 16: MNP予約番号 (Conditional)
-    reserveExpireDate?: string; // (Conditional) YYYYMMDD
+    reserveNumber: string; // Row 16: MNP予約番号 (Level 2)
+    reserveExpireDate?: string; // (Level 2) YYYYMMDD
+    lastnameKanji?: string; // Row 17: 名前(漢字) (Level 2)
+    firstnameKanji?: string; // Row 18: 由字(漢字) (Level 2)
+    lastnameZenKana?: string; // Row 19: 名前(全角カタカナ) (Level 2)
+    firstnameZenKana?: string; // Row 20: 由字(全角カタカナ) (Level 2)
+    gender?: string; // Row 21: 性別 ('M'/'W'/'C') (Level 2)
+    birthday?: string; // Row 22: 生年月日 YYYYMMDD (Level 2)
   };
-  firstnameKanji?: string; // Row 17: 由字(漢字) (Conditional)
-  lastnameKanji?: string; // Row 18: 名前(漢字) (Conditional)
-  firstnameZenKana?: string; // Row 19: 由字(全角カタカナ) (Conditional)
-  lastnameZenKana?: string; // Row 20: 名前(全角カタカナ) (Conditional)
-  gender?: string; // Row 21: 性別 ('M', 'F') (Required for identification)
-  birthday?: string; // Row 22: 生年月日 YYYYMMDD (Conditional)
   shipDate?: string; // Row 23: 出荷日 YYYYMMDD (Conditional)
   planCode?: string; // Row 24: プランコード (Max 32 chars) (Conditional)
   deliveryCode?: string; // Row 25: 顧客コード (Max 10 chars) (Conditional - OEM specific)
diff --git a/apps/bff/src/integrations/freebit/services/freebit-esim.service.ts b/apps/bff/src/integrations/freebit/services/freebit-esim.service.ts
index dc11c1d1..8ae52e04 100644
--- a/apps/bff/src/integrations/freebit/services/freebit-esim.service.ts
+++ b/apps/bff/src/integrations/freebit/services/freebit-esim.service.ts
@@ -24,13 +24,14 @@ export interface EsimActivationParams {
   repAccount?: string;
   deliveryCode?: string;
   globalIp?: "10" | "20";
-  mnp?: { reserveNumber: string; reserveExpireDate?: string };
-  identity?: {
-    firstnameKanji?: string;
+  mnp?: {
+    reserveNumber: string;
+    reserveExpireDate?: string;
     lastnameKanji?: string;
-    firstnameZenKana?: string;
+    firstnameKanji?: string;
     lastnameZenKana?: string;
-    gender?: string;
+    firstnameZenKana?: string;
+    gender?: string; // Freebit uses 'M'/'W'/'C' (caller should map 'F' → 'W')
     birthday?: string;
   };
 }
@@ -128,7 +129,6 @@ export class FreebitEsimService {
       deliveryCode,
       globalIp,
       mnp,
-      identity,
     } = params;
 
     if (!account || !eid) {
@@ -144,6 +144,19 @@ export class FreebitEsimService {
       );
     }
 
+    this.logger.log("PA05-41 preparing eSIM activation payload", {
+      account,
+      addKind: finalAddKind,
+      simKind: simKind || "E0",
+      aladinOperated,
+      hasMnp: !!mnp,
+      hasReserveNumber: !!mnp?.reserveNumber,
+      hasIdentity: !!(mnp?.lastnameKanji || mnp?.firstnameKanji),
+      gender: mnp?.gender,
+      planCode,
+      contractLine,
+    });
+
     try {
       const payload: FreebitEsimAccountActivationRequest = {
         authKey: await this.auth.getAuthKey(),
@@ -159,10 +172,19 @@ export class FreebitEsimService {
         repAccount,
         deliveryCode,
         globalIp,
+        // MNP object includes both reservation info AND identity fields (all Level 2 per PA05-41 spec)
         ...(mnp ? { mnp } : {}),
-        ...(identity ? identity : {}),
       } as FreebitEsimAccountActivationRequest;
 
+      this.logger.log("PA05-41 sending request", {
+        account,
+        addKind: finalAddKind,
+        aladinOperated,
+        mnpReserveNumber: mnp?.reserveNumber,
+        mnpHasIdentity: !!(mnp?.lastnameKanji || mnp?.firstnameKanji),
+        mnpGender: mnp?.gender,
+      });
+
       await this.client.makeAuthenticatedJsonRequest<
         FreebitEsimAccountActivationResponse,
         FreebitEsimAccountActivationRequest
@@ -172,9 +194,9 @@ export class FreebitEsimService {
         account,
         planCode,
         contractLine,
-        addKind: addKind || "N",
+        addKind: finalAddKind,
         scheduled: !!shipDate,
-        mnp: !!mnp,
+        isMnp: finalAddKind === "M",
       });
     } catch (error) {
       const message = extractErrorMessage(error);
@@ -182,7 +204,9 @@ export class FreebitEsimService {
         account,
         eid,
         planCode,
-        addKind,
+        addKind: finalAddKind,
+        aladinOperated,
+        isMnp: finalAddKind === "M",
         error: message,
       });
       throw new BadRequestException(`Failed to activate new eSIM account: ${message}`);
diff --git a/apps/bff/src/integrations/freebit/services/freebit-semiblack.service.ts b/apps/bff/src/integrations/freebit/services/freebit-semiblack.service.ts
index 328744be..6c7ecfea 100644
--- a/apps/bff/src/integrations/freebit/services/freebit-semiblack.service.ts
+++ b/apps/bff/src/integrations/freebit/services/freebit-semiblack.service.ts
@@ -1,15 +1,11 @@
 /**
- * Freebit Semi-Black Account Registration Service (PA05-18)
+ * Freebit Semi-Black Account Registration Service (PA05-19)
  *
- * Handles MVNO semi-black (半黒) SIM registration via the Freebit PA05-18 API.
- * This must be called BEFORE PA02-01 for physical SIMs to create the account
- * in Freebit's system.
+ * Handles MVNO semi-black (半黒) SIM registration via the Freebit PA05-19 API.
+ * For MNP transfers, this replaces PA02-01. For non-MNP, PA02-01 is used instead.
  *
  * Semi-black SIMs are pre-provisioned SIMs that need to be registered
  * to associate them with a customer account and plan.
- *
- * Error 210 "アカウント不在エラー" on PA02-01 indicates that PA05-18
- * was not called first.
  */
 
 import { Injectable, Inject, BadRequestException } from "@nestjs/common";
@@ -18,7 +14,7 @@ import { extractErrorMessage } from "@bff/core/utils/error.util.js";
 import { FreebitClientService } from "./freebit-client.service.js";
 
 /**
- * PA05-18 Semi-Black Account Registration parameters
+ * PA05-19 Semi-Black Account Registration parameters
  */
 export interface SemiBlackRegistrationParams {
   /** MSISDN (phone number) - 11-14 digits */
@@ -40,7 +36,7 @@ export interface SemiBlackRegistrationParams {
 }
 
 /**
- * PA05-18 Request payload structure
+ * PA05-19 Request payload structure
  */
 interface FreebitSemiBlackRequest {
   authKey: string;
@@ -58,7 +54,7 @@ interface FreebitSemiBlackRequest {
 }
 
 /**
- * PA05-18 Response structure
+ * PA05-19 Response structure
  */
 interface FreebitSemiBlackResponse {
   resultCode: number;
@@ -76,10 +72,10 @@ export class FreebitSemiBlackService {
   ) {}
 
   /**
-   * Register a semi-black SIM account (PA05-18)
+   * Register a semi-black SIM account (PA05-19)
    *
    * This registers a pre-provisioned (semi-black) physical SIM in Freebit's
-   * system. Must be called BEFORE PA02-01 account registration.
+   * system. For MNP transfers, this replaces PA02-01.
    *
    * @param params - Semi-black registration parameters
    * @throws BadRequestException if registration fails
@@ -117,7 +113,7 @@ export class FreebitSemiBlackService {
     // Default to today's date if not provided
     const effectiveShipDate = shipDate ?? this.formatTodayAsYYYYMMDD();
 
-    this.logger.log("Starting semi-black SIM registration (PA05-18)", {
+    this.logger.log("Starting semi-black SIM registration (PA05-19)", {
       account,
       productNumber,
       planCode,
@@ -146,7 +142,7 @@ export class FreebitSemiBlackService {
         Omit<FreebitSemiBlackRequest, "authKey">
       >("/mvno/semiblack/addAcnt/", payload);
 
-      this.logger.log("Semi-black SIM registration successful (PA05-18)", {
+      this.logger.log("Semi-black SIM registration successful (PA05-19)", {
         account,
         productNumber,
         planCode,
@@ -158,7 +154,7 @@ export class FreebitSemiBlackService {
       }
 
       const message = extractErrorMessage(error);
-      this.logger.error("Semi-black registration failed (PA05-18)", {
+      this.logger.error("Semi-black registration failed (PA05-19)", {
         account,
         productNumber,
         planCode,
diff --git a/apps/bff/src/modules/orders/services/fulfillment-step-executors.service.ts b/apps/bff/src/modules/orders/services/fulfillment-step-executors.service.ts
index cf96da1f..c54b3f7c 100644
--- a/apps/bff/src/modules/orders/services/fulfillment-step-executors.service.ts
+++ b/apps/bff/src/modules/orders/services/fulfillment-step-executors.service.ts
@@ -64,7 +64,7 @@ export class FulfillmentStepExecutors {
   }
 
   /**
-   * SIM fulfillment via Freebit (PA05-18 + PA02-01 + PA05-05)
+   * SIM fulfillment via Freebit (PA05-19/PA02-01 + PA05-05)
    */
   async executeSimFulfillment(
     ctx: OrderFulfillmentContext,
diff --git a/apps/bff/src/modules/orders/services/fulfillment-step-factory.service.ts b/apps/bff/src/modules/orders/services/fulfillment-step-factory.service.ts
index 8cde253f..d33bc2ea 100644
--- a/apps/bff/src/modules/orders/services/fulfillment-step-factory.service.ts
+++ b/apps/bff/src/modules/orders/services/fulfillment-step-factory.service.ts
@@ -37,7 +37,7 @@ export class FulfillmentStepFactory {
    * Step order:
    * 1. sf_status_update (Activating)
    * 2. order_details (retain in context)
-   * 3. sim_fulfillment (SIM orders only - PA05-18 + PA02-01 + PA05-05)
+   * 3. sim_fulfillment (SIM orders only - PA05-19/PA02-01 + PA05-05)
    * 4. sf_activated_update (SIM orders only)
    * 5. mapping (with SIM data for WHMCS)
    * 6. whmcs_create
@@ -111,7 +111,7 @@ export class FulfillmentStepFactory {
   ): DistributedStep {
     return {
       id: "sim_fulfillment",
-      description: "SIM activation via Freebit (PA05-18 + PA02-01 + PA05-05)",
+      description: "SIM activation via Freebit (PA05-19/PA02-01 + PA05-05)",
       execute: this.createTrackedStep(ctx, "sim_fulfillment", async () => {
         const result = await this.executors.executeSimFulfillment(ctx, payload);
         state.simFulfillmentResult = result;
diff --git a/apps/bff/src/modules/orders/services/sim-fulfillment.service.ts b/apps/bff/src/modules/orders/services/sim-fulfillment.service.ts
index 1e7a7cec..b1b7e9c2 100644
--- a/apps/bff/src/modules/orders/services/sim-fulfillment.service.ts
+++ b/apps/bff/src/modules/orders/services/sim-fulfillment.service.ts
@@ -67,6 +67,31 @@ export interface SimFulfillmentResult {
   eid?: string;
 }
 
+/**
+ * MNP configuration extracted from Salesforce order/porting fields
+ */
+interface MnpConfig {
+  reserveNumber?: string;
+  reserveExpireDate?: string;
+  account?: string;
+  firstnameKanji?: string;
+  lastnameKanji?: string;
+  firstnameZenKana?: string;
+  lastnameZenKana?: string;
+  gender?: string;
+  birthday?: string;
+}
+
+/**
+ * Map Salesforce gender code to Freebit gender code.
+ * Salesforce: 'M' (Male), 'F' (Female)
+ * Freebit:    'M' (Male), 'W' (Weiblich/Female), 'C' (Corporation)
+ */
+function mapGenderToFreebit(gender: string): string {
+  if (gender === "F") return "W";
+  return gender;
+}
+
 @Injectable()
 export class SimFulfillmentService {
   constructor(
@@ -115,6 +140,16 @@ export class SimFulfillmentService {
     const scheduledAt = this.readString(configurations["scheduledAt"]);
     const phoneNumber = this.readString(configurations["mnpPhone"]);
     const mnp = this.extractMnpConfig(configurations);
+    const isMnp = !!mnp?.reserveNumber;
+
+    this.logger.log("MNP detection result", {
+      orderId: orderDetails.id,
+      isMnp,
+      simType,
+      mnpReserveNumber: mnp?.reserveNumber,
+      mnpHasIdentity: !!(mnp?.lastnameKanji || mnp?.firstnameKanji),
+      mnpGender: mnp?.gender,
+    });
 
     const simPlanItem = orderDetails.items.find(
       (item: OrderItemDetails) =>
@@ -174,7 +209,9 @@ export class SimFulfillmentService {
         eid,
       };
     } else {
-      // Physical SIM activation flow (PA05-18 + PA02-01 + PA05-05)
+      // Physical SIM activation flow:
+      //   Non-MNP: PA02-01 + PA05-05
+      //   MNP:     PA05-19 + PA05-05
       if (!assignedPhysicalSimId) {
         throw new SimActivationException(
           "Physical SIM requires an assigned SIM from inventory (Assign_Physical_SIM__c)",
@@ -191,6 +228,8 @@ export class SimFulfillmentService {
         callWaitingEnabled,
         contactIdentity,
         assignmentDetails,
+        isMnp,
+        ...(mnp && { mnp }),
       });
 
       this.logger.log("Physical SIM fulfillment completed successfully", {
@@ -222,55 +261,62 @@ export class SimFulfillmentService {
     planSku: string;
     activationType: "Immediate" | "Scheduled";
     scheduledAt?: string;
-    mnp?: {
-      reserveNumber?: string;
-      reserveExpireDate?: string;
-      account?: string;
-      firstnameKanji?: string;
-      lastnameKanji?: string;
-      firstnameZenKana?: string;
-      lastnameZenKana?: string;
-      gender?: string;
-      birthday?: string;
-    };
+    mnp?: MnpConfig;
   }): Promise<void> {
     const { account, eid, planSku, activationType, scheduledAt, mnp } = params;
+    const isMnp = !!mnp?.reserveNumber;
+
+    this.logger.log("eSIM activation starting", {
+      account,
+      planSku,
+      isMnp,
+      addKind: isMnp ? "M" : "N",
+      aladinOperated: isMnp ? "20" : "10",
+      mnpReserveNumber: mnp?.reserveNumber,
+      mnpHasIdentity: !!(mnp?.lastnameKanji || mnp?.firstnameKanji),
+      mnpGender: mnp?.gender,
+    });
 
     try {
+      // Build unified MNP object with both reservation and identity data (all Level 2 per PA05-41)
+      const mnpPayload =
+        isMnp && mnp?.reserveNumber
+          ? {
+              reserveNumber: mnp.reserveNumber,
+              ...(mnp.reserveExpireDate && { reserveExpireDate: mnp.reserveExpireDate }),
+              ...(mnp.lastnameKanji && { lastnameKanji: mnp.lastnameKanji }),
+              ...(mnp.firstnameKanji && { firstnameKanji: mnp.firstnameKanji }),
+              ...(mnp.lastnameZenKana && { lastnameZenKana: mnp.lastnameZenKana }),
+              ...(mnp.firstnameZenKana && { firstnameZenKana: mnp.firstnameZenKana }),
+              // Map Salesforce gender 'F' → Freebit gender 'W' (Weiblich)
+              ...(mnp.gender && { gender: mapGenderToFreebit(mnp.gender) }),
+              ...(mnp.birthday && { birthday: mnp.birthday }),
+            }
+          : undefined;
+
       await this.freebitFacade.activateEsimAccountNew({
         account,
         eid,
         planCode: planSku,
         contractLine: "5G",
+        simKind: "E0", // Voice eSIM
+        addKind: isMnp ? "M" : "N",
+        aladinOperated: isMnp ? "20" : "10", // '20' = we provide identity for ALADIN
         ...(activationType === "Scheduled" && scheduledAt && { shipDate: scheduledAt }),
-        ...(mnp?.reserveNumber &&
-          mnp?.reserveExpireDate && {
-            mnp: {
-              reserveNumber: mnp.reserveNumber,
-              reserveExpireDate: mnp.reserveExpireDate,
-            },
-          }),
-        ...(mnp && {
-          identity: {
-            ...(mnp.firstnameKanji && { firstnameKanji: mnp.firstnameKanji }),
-            ...(mnp.lastnameKanji && { lastnameKanji: mnp.lastnameKanji }),
-            ...(mnp.firstnameZenKana && { firstnameZenKana: mnp.firstnameZenKana }),
-            ...(mnp.lastnameZenKana && { lastnameZenKana: mnp.lastnameZenKana }),
-            ...(mnp.gender && { gender: mnp.gender }),
-            ...(mnp.birthday && { birthday: mnp.birthday }),
-          },
-        }),
+        ...(mnpPayload && { mnp: mnpPayload }),
       });
 
       this.logger.log("eSIM activated successfully", {
         account,
         planSku,
+        isMnp,
         scheduled: activationType === "Scheduled",
       });
     } catch (error: unknown) {
       this.logger.error("eSIM activation failed", {
         account,
         planSku,
+        isMnp,
         error: extractErrorMessage(error),
       });
       throw error;
@@ -278,15 +324,21 @@ export class SimFulfillmentService {
   }
 
   /**
-   * Activate Physical SIM (Black SIM) via Freebit PA02-01 + PA05-05 APIs
+   * Activate Physical SIM (Black SIM) via Freebit APIs
    *
-   * Flow for Physical SIMs (Black SIMs):
+   * Non-MNP flow:
    * 1. Fetch SIM Inventory details from Salesforce
    * 2. Validate SIM status is "Available"
    * 3. Map product SKU to Freebit plan code
    * 4. Call Freebit PA02-01 (Account Registration) with createType="new"
    * 5. Call Freebit PA05-05 (Voice Options) to configure voice features
    * 6. Update SIM Inventory status to "Assigned"
+   *
+   * MNP flow:
+   * 1-3. Same as above
+   * 4. Call Freebit PA05-19 (Semi-Black MNP Registration) — replaces PA02-01
+   * 5. Call Freebit PA05-05 (Voice Options)
+   * 6. Update SIM Inventory status to "Assigned"
    */
   private async activatePhysicalSim(params: {
     orderId: string;
@@ -297,6 +349,8 @@ export class SimFulfillmentService {
     callWaitingEnabled: boolean;
     contactIdentity?: ContactIdentityData | undefined;
     assignmentDetails?: SimAssignmentDetails | undefined;
+    isMnp?: boolean;
+    mnp?: MnpConfig;
   }): Promise<{ phoneNumber: string; serialNumber: string }> {
     const {
       orderId,
@@ -307,15 +361,20 @@ export class SimFulfillmentService {
       callWaitingEnabled,
       contactIdentity,
       assignmentDetails,
+      isMnp = false,
+      mnp,
     } = params;
 
-    this.logger.log("Starting Physical SIM activation (PA02-01 + PA05-05)", {
+    this.logger.log("Starting Physical SIM activation", {
       orderId,
       simInventoryId,
       planSku,
+      isMnp,
+      path: isMnp ? "PA05-19 (MNP)" : "PA02-01 (new)",
       voiceMailEnabled,
       callWaitingEnabled,
       hasContactIdentity: !!contactIdentity,
+      mnpReserveNumber: mnp?.reserveNumber,
     });
 
     // Step 1 & 2: Fetch and validate SIM Inventory
@@ -337,28 +396,54 @@ export class SimFulfillmentService {
       orderId,
       simInventoryId,
       accountPhoneNumber,
+      ptNumber: simRecord.ptNumber,
       planCode,
+      isMnp,
     });
 
     try {
-      // Step 4: Call Freebit PA02-01 (Account Registration) for Black SIM
-      this.logger.log("Calling PA02-01 Account Registration", {
-        orderId,
-        account: accountPhoneNumber,
-        planCode,
-        createType: "new",
-      });
+      if (isMnp) {
+        // Step 4 (MNP): Call Freebit PA05-19 (Semi-Black MNP Registration)
+        // PA05-19 replaces PA02-01 for MNP transfers — it registers the account
+        // and initiates the MNP transfer in a single call
+        this.logger.log("Calling PA05-19 Semi-Black MNP Registration", {
+          orderId,
+          account: accountPhoneNumber,
+          productNumber: simRecord.ptNumber,
+          planCode,
+          mnpMethod: "10",
+        });
 
-      await this.freebitFacade.registerAccount({
-        account: accountPhoneNumber,
-        planCode,
-        createType: "new",
-      });
+        await this.freebitFacade.registerSemiBlackAccount({
+          account: accountPhoneNumber,
+          productNumber: simRecord.ptNumber,
+          planCode,
+        });
 
-      this.logger.log("PA02-01 Account Registration successful", {
-        orderId,
-        account: accountPhoneNumber,
-      });
+        this.logger.log("PA05-19 Semi-Black MNP Registration successful", {
+          orderId,
+          account: accountPhoneNumber,
+        });
+      } else {
+        // Step 4 (non-MNP): Call Freebit PA02-01 (Account Registration)
+        this.logger.log("Calling PA02-01 Account Registration", {
+          orderId,
+          account: accountPhoneNumber,
+          planCode,
+          createType: "new",
+        });
+
+        await this.freebitFacade.registerAccount({
+          account: accountPhoneNumber,
+          planCode,
+          createType: "new",
+        });
+
+        this.logger.log("PA02-01 Account Registration successful", {
+          orderId,
+          account: accountPhoneNumber,
+        });
+      }
 
       // Step 5: Call Freebit PA05-05 (Voice Options Registration)
       // Only call if we have contact identity data