diff --git a/vue-project/my-kintone-plugin/src/js/helper.ts b/vue-project/my-kintone-plugin/src/js/helper.ts
index 63558e1..b249e1d 100644
--- a/vue-project/my-kintone-plugin/src/js/helper.ts
+++ b/vue-project/my-kintone-plugin/src/js/helper.ts
@@ -168,7 +168,6 @@ const extractNoSubTableFields = (layout: Layout, baseFilter: FieldType[] | undef
 
 export function getFieldObj(fieldCode: string, { fields }: FieldsInfo, subTableCode?: string) {
   const meta = getMeta(fields, subTableCode);
-  if (!meta) return '';
   return meta[fieldCode];
 }
 
@@ -177,7 +176,6 @@ export function getMeta(fields: Properties, subTableCode?: string) {
     return fields;
   }
   let meta = fields;
-  if (!meta) return fields;
   const table = meta[subTableCode];
   if (isType.SUBTABLE(table)) {
     meta = table.fields;
diff --git a/vue-project/my-kintone-plugin/src/js/join.ts b/vue-project/my-kintone-plugin/src/js/join.ts
index ffa3cb8..5acddf2 100644
--- a/vue-project/my-kintone-plugin/src/js/join.ts
+++ b/vue-project/my-kintone-plugin/src/js/join.ts
@@ -1,6 +1,7 @@
+import type { CalcType } from '@/types/my-kintone';
 import { isType, type FieldType, type OneOf } from './kintone-rest-api-client';
 
-type CalcType = 'NUMBER' | 'NUMBER_DIGIT' | 'DATETIME' | 'DATE' | 'TIME' | 'HOUR_MINUTE' | 'DAY_HOUR_MINUTE';
+
 export type LeftCalcJoinType = Record<CalcType, FieldType[]>;
 
 export function isForceDisable(field: OneOf) {
diff --git a/vue-project/my-kintone-plugin/src/js/kintone-rest-api-client.ts b/vue-project/my-kintone-plugin/src/js/kintone-rest-api-client.ts
index bf7a25a..fd58f7f 100644
--- a/vue-project/my-kintone-plugin/src/js/kintone-rest-api-client.ts
+++ b/vue-project/my-kintone-plugin/src/js/kintone-rest-api-client.ts
@@ -54,7 +54,7 @@ export const types = typeNames.reduce(
 
 type ExtractOneOf<T extends FieldType> = Extract<OneOf, { type: T }>;
 function createTypeGuard<T extends FieldType>(type: T) {
-  return (value: OneOf): value is ExtractOneOf<T> => value.type === type;
+  return (value: OneOf): value is ExtractOneOf<T> => value?.type === type;
 }
 
 export const isType = Object.fromEntries(
diff --git a/vue-project/my-kintone-plugin/src/types/my-kintone.d.ts b/vue-project/my-kintone-plugin/src/types/my-kintone.d.ts
index 7cbded5..394f20c 100644
--- a/vue-project/my-kintone-plugin/src/types/my-kintone.d.ts
+++ b/vue-project/my-kintone-plugin/src/types/my-kintone.d.ts
@@ -1,3 +1,5 @@
 export interface KucEvent<T> {
   detail: T;
 }
+
+export type CalcType = 'NUMBER' | 'NUMBER_DIGIT' | 'DATETIME' | 'DATE' | 'TIME' | 'HOUR_MINUTE' | 'DAY_HOUR_MINUTE';