diff --git a/src/tanabata/kazari.c b/src/tanabata/kazari.c
index 95dc210..7cb968d 100644
--- a/src/tanabata/kazari.c
+++ b/src/tanabata/kazari.c
@@ -11,6 +11,10 @@ int tanabata_kazari_rem(Tanabata *tanabata, uint64_t sasa_id, uint64_t tanzaku_i
 }
 
 Tanzaku *tanabata_tanzaku_get_by_sasa(Tanabata *tanabata, uint64_t sasa_id) {
+    if (sasa_id == HOLE_ID) {
+        fprintf(stderr, "Failed to get tanzaku list: got hole ID\n");
+        return NULL;
+    }
     Tanzaku *tanzaku_list = NULL;
     uint64_t tanzaku_count = 0;
     for (uint64_t i = 0; i < tanabata->shoppyou.size; i++) {
@@ -29,6 +33,10 @@ Tanzaku *tanabata_tanzaku_get_by_sasa(Tanabata *tanabata, uint64_t sasa_id) {
 }
 
 Sasa *tanabata_sasa_get_by_tanzaku(Tanabata *tanabata, uint64_t tanzaku_id) {
+    if (tanzaku_id == HOLE_ID) {
+        fprintf(stderr, "Failed to get sasa list: got hole ID\n");
+        return NULL;
+    }
     Sasa *sasa_list = NULL;
     uint64_t sasa_count = 0;
     for (uint64_t i = 0; i < tanabata->shoppyou.size; i++) {
diff --git a/src/tanabata/sasa.c b/src/tanabata/sasa.c
index 7291a5a..654cc1e 100644
--- a/src/tanabata/sasa.c
+++ b/src/tanabata/sasa.c
@@ -42,7 +42,7 @@ Sasa tanabata_sasa_get_by_id(Tanabata *tanabata, uint64_t sasa_id) {
 
 Sasa tanabata_sasa_get_by_path(Tanabata *tanabata, const char *path) {
     for (uint64_t i = 0; i < tanabata->sasahyou.size; i++) {
-        if (strcmp(tanabata->sasahyou.database[i].path, path) == 0) {
+        if (tanabata->sasahyou.database[i].id != HOLE_ID && strcmp(tanabata->sasahyou.database[i].path, path) == 0) {
             return tanabata->sasahyou.database[i];
         }
     }
diff --git a/src/tanabata/tanzaku.c b/src/tanabata/tanzaku.c
index 42ca369..f889742 100644
--- a/src/tanabata/tanzaku.c
+++ b/src/tanabata/tanzaku.c
@@ -41,7 +41,7 @@ Tanzaku tanabata_tanzaku_get_by_id(Tanabata *tanabata, uint64_t tanzaku_id) {
 
 Tanzaku tanabata_tanzaku_get_by_name(Tanabata *tanabata, const char *name) {
     for (uint64_t i = 0; i < tanabata->sappyou.size; i++) {
-        if (strcmp(tanabata->sappyou.database[i].name, name) == 0) {
+        if (tanabata->sappyou.database[i].id != HOLE_ID && strcmp(tanabata->sappyou.database[i].name, name) == 0) {
             return tanabata->sappyou.database[i];
         }
     }