diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 968ac906..39f375fc 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -20,7 +20,7 @@
     {
       "name": "claudian",
       "description": "Obsidian integration for Claude Code. Auto-saves conversation notes and decisions to your Obsidian vault (田中雄一郎OS保管庫).",
-      "version": "1.3.0",
+      "version": "1.4.0",
       "author": {
         "name": "YUICHIRO TANAKA"
       },
diff --git a/plugins/claudian/.claude-plugin/plugin.json b/plugins/claudian/.claude-plugin/plugin.json
index c6a95115..d8f341e7 100644
--- a/plugins/claudian/.claude-plugin/plugin.json
+++ b/plugins/claudian/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "claudian",
-  "version": "1.3.0",
+  "version": "1.4.0",
   "description": "Obsidian integration for Claude Code. Auto-saves conversation notes and decisions to your Obsidian vault (田中雄一郎OS保管庫).",
   "author": {
     "name": "YUICHIRO TANAKA"
diff --git a/plugins/claudian/README.md b/plugins/claudian/README.md
index eda99cc1..09243da0 100644
--- a/plugins/claudian/README.md
+++ b/plugins/claudian/README.md
@@ -93,12 +93,18 @@ order:
 1. `--vault <path>` on the command line
 2. `CLAUDIAN_VAULT_ROOT` environment variable
 3. `vaultRoot` in `~/.claudian/config.json` (path overridable with `CLAUDIAN_CONFIG`)
-4. Auto-detection of a directory named `田中雄一郎OS保管庫` under:
-   `~/TANAKA-BRAIN`, `~`, `~/Documents`,
+4. Auto-detection of a directory named `田中雄一郎OS保管庫` under, in order:
+   `~` (the current layout — `/Users/nesty/田中雄一郎OS保管庫`),
+   `~/TANAKA-BRAIN` (the old layout), `~/Documents`,
    `~/Library/Mobile Documents/iCloud~md~obsidian/Documents`,
    `~/Library/Mobile Documents/com~apple~CloudDocs`, `~/Dropbox`,
    `~/Google Drive`, `~/obsidian`
 
+The home folder is checked first on purpose: a backup or an old copy restored
+from the Trash must not outrank the live vault. When more than one candidate
+exists the script uses the first and prints the rest on stderr, so a duplicate
+never swallows notes unnoticed.
+
 If the vault lives in one of those places, nothing to configure. Otherwise pin
 it once per machine:
 
diff --git a/plugins/claudian/scripts/obsidian-save.mjs b/plugins/claudian/scripts/obsidian-save.mjs
index 6f9a5a51..fc7f6ce6 100644
--- a/plugins/claudian/scripts/obsidian-save.mjs
+++ b/plugins/claudian/scripts/obsidian-save.mjs
@@ -66,8 +66,10 @@ export function configFilePath(env = process.env, home = homedir()) {
 
 export function vaultCandidates(vaultName = DEFAULT_VAULT_NAME, home = homedir()) {
   return [
-    join(home, "TANAKA-BRAIN", vaultName),
     join(home, vaultName),
+    // Legacy layout, kept last-resort on purpose: an old copy restored from the
+    // Trash must never outrank the vault that actually sits in the home folder.
+    join(home, "TANAKA-BRAIN", vaultName),
     join(home, "Documents", vaultName),
     join(home, "Library", "Mobile Documents", "iCloud~md~obsidian", "Documents", vaultName),
     join(home, "Library", "Mobile Documents", "com~apple~CloudDocs", vaultName),
@@ -121,9 +123,11 @@ export function resolveVaultRoot({ explicit = null, env = process.env, home = ho
   }
 
   const candidates = vaultCandidates(vaultName, home);
-  const found = candidates.find(isDirectory);
-  if (found) {
-    return { root: found, source: "自動検出", vaultName };
+  const matches = candidates.filter(isDirectory);
+  if (matches.length > 0) {
+    // Duplicates and restored backups are common while a vault is being
+    // reorganised, so report the ones that lost rather than picking silently.
+    return { root: matches[0], source: "自動検出", vaultName, alternatives: matches.slice(1) };
   }
 
   return { root: null, source: null, vaultName, candidates };
@@ -304,7 +308,13 @@ export function listFolders(argv, { env = process.env, home = homedir() } = {})
   const resolved = requireVault({ explicit: vault, createVault, env, home });
   const { folders, sources } = resolveFolders({ vaultRoot: resolved.root, env, home });
 
-  return { vaultRoot: resolved.root, source: resolved.source, folders, sources };
+  return {
+    vaultRoot: resolved.root,
+    source: resolved.source,
+    alternatives: resolved.alternatives ?? [],
+    folders,
+    sources
+  };
 }
 
 /**
@@ -369,6 +379,7 @@ export function scanFolders(argv, { env = process.env, home = homedir() } = {})
   return {
     vaultRoot: resolved.root,
     source: resolved.source,
+    alternatives: resolved.alternatives ?? [],
     configPath,
     directories,
     proposed,
@@ -411,7 +422,13 @@ export function saveNote(argv, { env = process.env, home = homedir(), now = new
   const filePath = uniqueFilePath(dirPath, `${date}_${sanitizeTitle(title)}`);
   writeFileSync(filePath, renderNote({ title, content, tags, date }), "utf8");
 
-  return { filePath, vaultRoot: resolved.root, source: resolved.source, folder: relativeDir };
+  return {
+    filePath,
+    vaultRoot: resolved.root,
+    source: resolved.source,
+    alternatives: resolved.alternatives ?? [],
+    folder: relativeDir
+  };
 }
 
 const WIDE_CHARACTER = /[ᄀ-ᅟ⺀-꓏가-힣豈-﫿︰-﹯＀-｠￠-￦]/;
@@ -424,6 +441,17 @@ function displayWidth(text) {
   return width;
 }
 
+function warnAboutAlternatives(alternatives) {
+  if (!alternatives || alternatives.length === 0) {
+    return;
+  }
+  console.error(`注意: 保管庫の候補が ${alternatives.length + 1} 件見つかりました。使わなかったもの:`);
+  for (const alternative of alternatives) {
+    console.error(`  - ${alternative}`);
+  }
+  console.error("こちらが正しい場合は CLAUDIAN_VAULT_ROOT で固定してください。");
+}
+
 function main() {
   try {
     const argv = process.argv.slice(2);
@@ -431,6 +459,7 @@ function main() {
     if (argv.includes("--scan-folders")) {
       const scan = scanFolders(argv);
       console.log(`保管庫: ${scan.vaultRoot} (${scan.source})`);
+      warnAboutAlternatives(scan.alternatives);
       console.log(`検出したフォルダ (${scan.directories.length}):`);
       for (const directory of scan.directories) {
         console.log(`  ${directory}`);
@@ -451,8 +480,9 @@ function main() {
     }
 
     if (argv.includes("--list-folders")) {
-      const { vaultRoot, source, folders, sources } = listFolders(argv);
+      const { vaultRoot, source, alternatives, folders, sources } = listFolders(argv);
       console.log(`保管庫: ${vaultRoot} (${source})`);
+      warnAboutAlternatives(alternatives);
       console.log(`フォルダ定義: ${sources.join(" → ")}`);
       const width = Math.max(0, ...Object.keys(folders).map(displayWidth));
       for (const [alias, directory] of Object.entries(folders)) {
@@ -461,8 +491,9 @@ function main() {
       return;
     }
 
-    const { filePath, vaultRoot, source, folder } = saveNote(argv);
+    const { filePath, vaultRoot, source, alternatives, folder } = saveNote(argv);
     console.error(`保管庫: ${vaultRoot}/${folder} (${source})`);
+    warnAboutAlternatives(alternatives);
     console.log(basename(filePath));
   } catch (error) {
     console.error(error instanceof Error ? error.message : String(error));
diff --git a/plugins/claudian/skills/obsidian-save/SKILL.md b/plugins/claudian/skills/obsidian-save/SKILL.md
index 827363cc..2775c23e 100644
--- a/plugins/claudian/skills/obsidian-save/SKILL.md
+++ b/plugins/claudian/skills/obsidian-save/SKILL.md
@@ -75,9 +75,14 @@ place. Resolution order:
 1. `--vault <path>`
 2. `CLAUDIAN_VAULT_ROOT`
 3. `vaultRoot` in `~/.claudian/config.json`
-4. Auto-detection of `田中雄一郎OS保管庫` under `~/TANAKA-BRAIN`, `~`,
+4. Auto-detection of `田中雄一郎OS保管庫` under `~` (the real layout:
+   `/Users/nesty/田中雄一郎OS保管庫`), then `~/TANAKA-BRAIN` (old layout),
    `~/Documents`, the Obsidian/iCloud Drive folders, `~/Dropbox`, `~/Google Drive`
 
+If several candidates exist, the script uses the first and prints the others on
+stderr. Pass that warning on to the user — it usually means a backup or a copy
+restored from the Trash is sitting next to the real vault.
+
 Default folder mapping (overridden by `<vault>/.claudian.json`):
 
 | folder value | directory |
diff --git a/tests/obsidian-save.test.mjs b/tests/obsidian-save.test.mjs
index d78dc7aa..312ec705 100644
--- a/tests/obsidian-save.test.mjs
+++ b/tests/obsidian-save.test.mjs
@@ -143,6 +143,53 @@ test("resolveVaultRoot honours --vault, the env var, the config file, then auto-
   assert.equal(detected.source, "自動検出");
 });
 
+test("resolveVaultRoot finds the vault directly under the home folder", () => {
+  const home = makeTempDir("claudian-home-");
+  const vault = path.join(home, DEFAULT_VAULT_NAME);
+  fs.mkdirSync(vault, { recursive: true });
+
+  const resolved = resolveVaultRoot({ env: {}, home });
+
+  assert.equal(resolved.root, vault);
+  assert.equal(resolved.source, "自動検出");
+  assert.deepEqual(resolved.alternatives, []);
+});
+
+test("the home-folder vault outranks an old copy restored under TANAKA-BRAIN", () => {
+  const home = makeTempDir("claudian-home-");
+  const vault = path.join(home, DEFAULT_VAULT_NAME);
+  const legacy = path.join(home, "TANAKA-BRAIN", DEFAULT_VAULT_NAME);
+  fs.mkdirSync(vault, { recursive: true });
+  fs.mkdirSync(legacy, { recursive: true });
+
+  const resolved = resolveVaultRoot({ env: {}, home });
+
+  assert.equal(resolved.root, vault);
+  assert.deepEqual(resolved.alternatives, [legacy]);
+
+  // The losing candidate is reported so a duplicate cannot swallow notes unnoticed.
+  const saved = saveNote(["--title", "メモ", "--content", "本文"], { env: {}, home });
+  assert.equal(saved.vaultRoot, vault);
+  assert.deepEqual(saved.alternatives, [legacy]);
+});
+
+test("the CLI warns when more than one vault candidate exists", () => {
+  const home = makeTempDir("claudian-home-");
+  const vault = path.join(home, DEFAULT_VAULT_NAME);
+  const legacy = path.join(home, "TANAKA-BRAIN", DEFAULT_VAULT_NAME);
+  fs.mkdirSync(vault, { recursive: true });
+  fs.mkdirSync(legacy, { recursive: true });
+
+  const result = run(process.execPath, [SCRIPT, "--title", "メモ", "--content", "本文"], {
+    env: { ...process.env, HOME: home, CLAUDIAN_VAULT_ROOT: "", CLAUDIAN_CONFIG: path.join(home, "absent.json") }
+  });
+
+  assert.equal(result.status, 0);
+  assert.match(result.stderr, /保管庫の候補が 2 件見つかりました/);
+  assert.match(result.stderr, new RegExp(legacy.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")));
+  assert.equal(fs.existsSync(path.join(vault, "00_INBOX", result.stdout.trim())), true);
+});
+
 test("resolveVaultRoot expands ~ and honours CLAUDIAN_VAULT_NAME", () => {
   const home = makeTempDir("claudian-home-");
   const named = path.join(home, "Documents", "別の保管庫");