diff --git a/browser/dom/edit.ts b/browser/dom/edit.ts
index 069475b..7237d43 100644
--- a/browser/dom/edit.ts
+++ b/browser/dom/edit.ts
@@ -3,7 +3,9 @@ import { press } from "./press.ts";
 import { getLineCount } from "./node.ts";
 import { range } from "../../range.ts";
 import { textInput } from "./dom.ts";
-import { isArray, isNumber, isString } from "@core/unknownutil";
+import { isArray } from "@core/unknownutil/is/array";
+import { isNumber } from "@core/unknownutil/is/number";
+import { isString } from "@core/unknownutil/is/string";
 import { delay } from "@std/async/delay";
 
 export const undo = (count = 1): void => {
diff --git a/browser/dom/node.ts b/browser/dom/node.ts
index f4c60ed..640385b 100644
--- a/browser/dom/node.ts
+++ b/browser/dom/node.ts
@@ -1,5 +1,8 @@
-import { isNumber, isString, isUndefined } from "@core/unknownutil";
-import { ensure, isArray } from "@core/unknownutil";
+import { isArray } from "@core/unknownutil/is/array";
+import { isNumber } from "@core/unknownutil/is/number";
+import { isString } from "@core/unknownutil/is/string";
+import { ensure } from "@core/unknownutil/ensure";
+import { isUndefined } from "@core/unknownutil/is/undefined";
 import { getCachedLines } from "./getCachedLines.ts";
 import { takeInternalLines } from "./takeInternalLines.ts";
 import type { BaseLine, Line } from "@cosense/types/userscript";
diff --git a/rest/parseHTTPError.ts b/rest/parseHTTPError.ts
index cec4fbf..54f6d00 100644
--- a/rest/parseHTTPError.ts
+++ b/rest/parseHTTPError.ts
@@ -9,12 +9,11 @@ import type {
   SessionError,
 } from "@cosense/types/rest";
 import type { Maybe } from "option-t/maybe";
-import {
-  isArrayOf,
-  isLiteralOneOf,
-  isRecord,
-  isString,
-} from "@core/unknownutil";
+import { isArrayOf } from "@core/unknownutil/is/array-of";
+import { isLiteralOneOf } from "@core/unknownutil/is/literal-one-of";
+import { isRecord } from "@core/unknownutil/is/record";
+import { isString } from "@core/unknownutil/is/string";
+
 import type { HTTPError } from "./responseIntoResult.ts";
 
 export interface RESTfullAPIErrorMap {
diff --git a/text.ts b/text.ts
index 69668e0..74a5ea4 100644
--- a/text.ts
+++ b/text.ts
@@ -1,4 +1,4 @@
-import { isString } from "@core/unknownutil";
+import { isString } from "@core/unknownutil/is/string";
 
 /** インデント数を数える */
 export const getIndentCount = (text: string): number =>