WorldClockTools · 時刻をわかりやすく

The world's time, clean and accurate

World clock, timezone converter, and meeting planner built for remote teams, digital nomads, and anyone working across timezones.

Open World Clock Plan a Meeting

Your local time

--:--:--

Detecting your timezone…

いま、世界では

昼夜勤務時間

New York

Working

05:15:04 PM

EDT·UTC-04:00·Sunday, May 31

London

10:15:04 PM

GMT+1·UTC+01:00·Sunday, May 31

Tokyo

06:15:04 AM

GMT+9·UTC+09:00·Monday, Jun 1

Dubai

01:15:04 AM

GMT+4·UTC+04:00·Monday, Jun 1

方法

このページの時刻を信頼できる形に保つ仕組み

タイムゾーンデータ

可能な限り IANA 識別子を使い、固定 UTC 差ではなく実際の地域ルールに従います。

夏時間

DST は日付に応じて処理されます。地域の制度変更は再生成時に更新データへ反映されます。

精度の限界

ライブ時計は端末の時計に依存します。予定調整には有用ですが、認証された原子時計ではありません。

ローカル保存

保存した都市、チーム、設定は、共有や書き出しをしない限り同じ端末のブラウザ内に残ります。

データ確認

タイムゾーン規則

IANA tzdb

IANA 識別子で、固定 UTC 差ではなく日付別のオフセットを扱います。

都市データ

GeoNames

GeoNames 由来データが都市ページ、検索、主要都市リストを支えます。

鮮度

2026年4月30日

ライブ値はリクエスト時に計算され、出典メモには確認日を表示します。

編集方針

日本語ページでは、単語の直訳よりも「会議を組む」「市場時間を確認する」「現地時刻を調べる」といった実際の使い道に合わせて説明します。

出典: IANA tzdb、GeoNames 由来の都市データ、Nager.Date、OurAirports、取引所カレンダー、精査したイベント出典。出典メモ

確認日: 2026年4月30日

ライブ値: 現在時刻、日照、マーケット状態、カウントダウンは表示時点で計算されます。確認日は基礎データと本文の確認日であり、政府・取引所・航空会社・主催者の変更を保証するものではありません。

Language evidence

日本語 homepage quality signals

This homepage is treated as the safe localized surface for Japanese-language users coordinating with Asia-Pacific, Europe, and North America. It shows native copy, route boundaries, canonical data policy, and entry points before we expose deeper generated pages in that language.

Evidence score

12/12

東京現在時刻世界時計時差変換

Index posture

index, follow

Japanese is part of the localized homepage/index wave. The page can rank, but deeper localized inventory remains gated.

Locale and direction

ja · LTR

日本語 is rendered with the ja Intl locale and LTR document direction hint.

Ready route surface

4 language-ready routes

Only homepage-level tools are opened broadly: Homepage, World clock, Time-zone converter, Meeting planner. Generated city, airport, holiday, and days-until routes stay canonical unless separately approved.

Audience fit

Japanese

Japanese-language users coordinating with Asia-Pacific, Europe, and North America. Examples used on this page include Tokyo, Osaka, Singapore, Los Angeles.

Canonical data policy

shared source data

IANA timezone rules, exchange sessions, airport codes, holidays, and countdown dates come from the same canonical datasets in every language.

Quality focus

content before expansion

Japanese pages prioritize practical clock answers and exact scheduling terms before broader route localization.

Localized entry matrix

Which 日本語 routes are ready to rank

Homepage, world clock, converter, and meeting planner can advertise localized alternates. Generated route families stay English-canonical unless they have native depth.

User-language cues

東京現在時刻 · 世界時計 · 時差変換

These are representative Japanese search intents the homepage now answers without opening broad deep-page inventory.

Regional workflow fit

Why this homepage is useful for 日本語 users

Regional examples and workflow examples are visible on the page so the locale is not just a translated shell. They show what users can do immediately without sending Google into unfinished deep localized route families.

Recognizable cities

Tokyo, Osaka, Singapore, Los Angeles anchor the locale to places users are likely to search before opening broader city directories.

Workflow examples

Japan-US meetings; market open checks; international event timing are the practical tasks this homepage should satisfy first.

Expansion rule

New localized route families should be opened only when metadata, body copy, internal links, canonical rules, and source caveats are all native-quality.

Language page trust

How this language time page is localized

The homepage is the safest place to strengthen language relevance first: it can explain what is localized, what remains canonical, and which existing tools are the strongest entry points without adding new indexable inventory.

Localization boundary

Japanese pages emphasize exact local time, exchange sessions, and international scheduling clarity. Japanese is indexable at the homepage level, while deep page expansion stays cautious until the content quality signal is stronger.

Best entry points

Japanese users should start with World Clock, Meeting Planner, and Market Hours. These tools carry the strongest combination of live utility, source notes, and stable canonical paths.

Regional examples

The homepage points users toward recognizable cities such as Tokyo, Osaka, and Singapore before deep browsing. This keeps the language page useful without opening thousands of thin localized URLs.

Canonical data policy

Timezones, airport codes, market sessions, holidays, and countdown dates are pulled from the same canonical datasets across languages. Localized copy changes the presentation, not the underlying fact record.

Freshness posture

Language pages should earn index recovery by improving clarity, examples, and trust notes on existing routes before adding more localized inventory to the sitemap.

Indexability signal

Japanese participates in the localized homepage/tool index wave, but generated city, airport, holiday, countdown, and market pages still need separate proof before they should advertise localized alternates.

Route readiness

The language-ready route set is intentionally small: homepage, world clock, time-zone converter, and meeting planner. These surfaces have native metadata, translated interface copy, and clear user intent.

Deep-route safety

Broad programmatic route families should stay English-canonical until they pass body-copy, metadata, internal-link, hreflang, and noindex consistency checks in the target language.

User proof points

Japanese examples should be concrete: cities such as Tokyo, Osaka, and Singapore, workflows such as World Clock, Meeting Planner, and Market Hours, and visible methodology notes that explain source limits.

Indexing boundary: this pass improves the existing language homepages and core tools. It does not expand deep localized route count or add new sitemap URLs.