diff --git a/include/tdbms.h b/include/tdbms.h
index 7c1b82f..8a297d7 100644
--- a/include/tdbms.h
+++ b/include/tdbms.h
@@ -24,6 +24,7 @@ enum TRC {
     trc_sasa_add = 0b10010,
     trc_sasa_update = 0b10100,
     trc_sasa_remove = 0b10001,
+    trc_sasa_remove_by_tanzaku = 0b101001,
     trc_tanzaku_get = 0b100000,
     trc_tanzaku_get_by_sasa = 0b11000,
     trc_tanzaku_add = 0b100010,
diff --git a/tdbms/server/tdbms-server.c b/tdbms/server/tdbms-server.c
index b114a4a..36c30ea 100644
--- a/tdbms/server/tdbms-server.c
+++ b/tdbms/server/tdbms-server.c
@@ -557,6 +557,22 @@ int execute(char *request, char **response) {
         }
         return tanabata_sasa_rem(tanabata, sasa_id);
     }
+    if (request_code == trc_sasa_remove_by_tanzaku) {
+        if (tanabata == NULL) {
+            return 1;
+        }
+        char *endptr;
+        uint64_t tanzaku_id = strtoull(request_body, &endptr, 0);
+        if (*endptr != 0) {
+            return 1;
+        }
+        Sasa *list = tanabata_sasa_get_by_tanzaku(tanabata, tanzaku_id);
+        for (Sasa *temp = list; temp->id != HOLE_ID; temp++) {
+            tanabata_sasa_rem(tanabata, temp->id);
+        }
+        free(list);
+        return 0;
+    }
     if (request_code == trc_tanzaku_get) {
         if (tanabata == NULL) {
             return 1;
@@ -680,6 +696,22 @@ int execute(char *request, char **response) {
         }
         return tanabata_tanzaku_rem(tanabata, tanzaku_id);
     }
+    if (request_code == trc_tanzaku_remove_by_sasa) {
+        if (tanabata == NULL) {
+            return 1;
+        }
+        char *endptr;
+        uint64_t sasa_id = strtoull(request_body, &endptr, 0);
+        if (*endptr != 0) {
+            return 1;
+        }
+        Tanzaku *list = tanabata_tanzaku_get_by_sasa(tanabata, sasa_id);
+        for (Tanzaku *temp = list; temp->id != HOLE_ID; temp++) {
+            tanabata_tanzaku_rem(tanabata, temp->id);
+        }
+        free(list);
+        return 0;
+    }
     return 1;
 }