diff --git a/db.ts b/db.ts
index 55269ee..79b1110 100644
--- a/db.ts
+++ b/db.ts
@@ -63,6 +63,8 @@ export type PMeta = {
 type Tag = {
     id: number;
     tag: string;
+    translated: string | undefined;
+    intro: string | undefined;
 };
 export type EhFile = {
     id: number;
@@ -125,7 +127,9 @@ const PMETA_TABLE = `CREATE TABLE pmeta (
 );`;
 const TAG_TABLE = `CREATE TABLE tag (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
-    tag TEXT
+    tag TEXT,
+    translated TEXT,
+    intro TEXT
 );`;
 const GTAG_TABLE = `CREATE TABLE gtag (
     gid INT,
@@ -151,7 +155,7 @@ export class EhDb {
     #lock_file: string | undefined;
     #dblock_file: string | undefined;
     #_tags: Map<string, number> | undefined;
-    readonly version = new SemVer("1.0.0-0");
+    readonly version = new SemVer("1.0.0-1");
     constructor(base_path: string) {
         this.db = new DB(join(base_path, "data.db"));
         this.db.execute("PRAGMA main.locking_mode=EXCLUSIVE;");
@@ -190,6 +194,13 @@ export class EhDb {
         this.#updateExistsTable();
         const v = this.#read_version();
         if (!v) return false;
+        if (v.compare(this.version) === -1) {
+            if (v.compare("1.0.0-1") === -1) {
+                this.db.execute("ALTER TABLE tag ADD translated TEXT;");
+                this.db.execute("ALTER TABLE tag ADD intro TEXT;");
+            }
+            this.#write_version();
+        }
         if (
             ALL_TABLES.length !== this.#exist_table.size ||
             !ALL_TABLES.every((x) => this.#exist_table.has(x))
@@ -511,4 +522,25 @@ export class EhDb {
             throw e;
         }
     }
+    update_tags(tag: string, translated: string, intro: string) {
+        const id = this.#tags.get(tag);
+        if (id === undefined) {
+            this.db.query(
+                "INSERT INTO tag (tag, translated, intro) VALUES (?, ?, ?);",
+                [tag, translated, intro],
+            );
+            const r = this.db.queryEntries<Tag>(
+                "SELECT * FROM tag WHERE tag = ?;",
+                [tag],
+            );
+            this.#tags.set(tag, r[0].id);
+        } else {
+            this.db.query("INSERT OR REPLACE INTO tag VALUES (?, ?, ?, ?)", [
+                id,
+                tag,
+                translated,
+                intro,
+            ]);
+        }
+    }
 }
diff --git a/eh_translation.ts b/eh_translation.ts
new file mode 100644
index 0000000..5a56512
--- /dev/null
+++ b/eh_translation.ts
@@ -0,0 +1,63 @@
+import { EhDb } from "./db.ts";
+
+export type GHAuthor = {
+    name: string;
+    email: string;
+    when: string;
+};
+export type EHTHeader = {
+    sha: string;
+    message: string;
+    author: GHAuthor;
+    committer: GHAuthor;
+};
+export type EHTData = {
+    namespace: string;
+    frontMatters: {
+        name: string;
+        description: string;
+        key: string;
+        rules: string[];
+    };
+    count: number;
+    data: {
+        [x: string]: {
+            name: string;
+            intro: string;
+            links: string;
+        };
+    };
+};
+export type EHTTextFile = {
+    version: number;
+    repo: string;
+    head: EHTHeader;
+    data: EHTData[];
+};
+
+async function fetch_eht_file() {
+    const re = await fetch(
+        "https://github.com/EhTagTranslation/DatabaseReleases/raw/master/db.text.json",
+    );
+    if (re.status != 200) throw Error("fetch failed");
+    return re.text();
+}
+
+export async function load_eht_file(
+    location: string | undefined = undefined,
+): Promise<EHTTextFile> {
+    const s = location === undefined
+        ? await fetch_eht_file()
+        : await Deno.readTextFile(location);
+    return JSON.parse(s);
+}
+
+export function update_database_tag(db: EhDb, f: EHTTextFile) {
+    for (const d of f.data) {
+        Object.getOwnPropertyNames(d.data).forEach((name) => {
+            const tag = `${d.namespace}:${name}`;
+            const t = d.data[name];
+            db.update_tags(tag, t.name, t.intro);
+        });
+    }
+}
diff --git a/main.ts b/main.ts
index 5289409..ffb3a8a 100644
--- a/main.ts
+++ b/main.ts
@@ -5,6 +5,7 @@ import { AlreadyClosedError, TaskManager } from "./task_manager.ts";
 import { ParsedUrl, parseUrl, UrlType } from "./url.ts";
 import { sure_dir } from "./utils.ts";
 import { EhDb } from "./db.ts";
+import { load_eht_file, update_database_tag } from "./eh_translation.ts";
 
 function show_help() {
     console.log("Usage: main.ts [options]");
@@ -19,6 +20,7 @@ enum CMD {
     Download,
     Run,
     Optimize,
+    UpdateTagTranslation,
 }
 
 const args = parse(Deno.args, {
@@ -38,6 +40,9 @@ let cmd = CMD.Unknown;
 if (rcmd == "d" || rcmd == "download") cmd = CMD.Download;
 if (rcmd == "r" || rcmd == "run") cmd = CMD.Run;
 if (rcmd == "optimize") cmd = CMD.Optimize;
+if (rcmd == "utt" || rcmd == "update_tag_translation") {
+    cmd = CMD.UpdateTagTranslation;
+}
 if (cmd == CMD.Unknown) {
     throw Error(`Unknown command: ${rcmd}`);
 }
@@ -80,6 +85,13 @@ function optimize() {
     db.optimize();
     db.close();
 }
+async function update_tag_translation() {
+    const db = new EhDb(settings.base);
+    const f = await load_eht_file(
+        args._.length > 1 ? args._[1].toString() : undefined,
+    );
+    update_database_tag(db, f);
+}
 async function main() {
     await sure_dir(settings.base);
     if (cmd == CMD.Download) {
@@ -88,6 +100,8 @@ async function main() {
         await run();
     } else if (cmd == CMD.Optimize) {
         optimize();
+    } else if (cmd == CMD.UpdateTagTranslation) {
+        await update_tag_translation();
     }
 }