渋谷マチマチ プライバシーポリシー
最終更新日: 2026年9月27日 / 発行者: 今井涼晴
要点
- アカウント登録は
ありません。 入力するのは ニックネームだけです。 - 位置情報は、お互いが
承認した 、あと 渋谷駅から 半径1.5km以内に いる間だけ、 相手との 距離と 方角を 計算する ために 送ります。 - 相手に
届くのは距離・方角・階の 差だけ です。あなたの 座標 その ものは 相手に も ほかの 誰にも 届きません。 - サーバーは
待ち合わせ中の 最新の 位置1点だけを 一時的に 保持し、共有を やめた 、時点で 削除 作成から3時間で 部屋ごと します。自動削除 位置の 履歴は 残さず、 座標を ログに 書き出すこともありません。 - カメラ映像
(AR表示)と 端末の 向きは 端末の 中だけで 使い、 送信も 保存もしません。 - 道順案内
( 「場所へ 行く」 「道順で 案内」)は 端末の 中だけで 計算し、 現在地・ 行き先・経路を 送信しません。 - 広告、
アクセス解析、 トラッキングの 仕組みは 入っていません。 情報を 販売したり、 広告目的で 第三者に 渡したりする ことは ありません。
1. 取得する情報と使い道
(1) ニックネーム
待ち合わせの
(2) 位置情報(正確な位置)
待ち合わせの
サーバー
相手の
(3) 今いる階
選んだ
(4) 待ち合わせ場所(選んだ場合だけ)
「待ち合わせ場所を
(5) 「会えた!」の判定
「会えた!」を
(6) 通信に伴う情報
アプリと
(7) カメラ・端末の向き
「ARで
(8) 道順案内
「場所へ
2. 地図データの読み込み
3D地図を
3. 第三者への提供
法令にもとづく
4. 端末の中に残る情報
参加中の
5. 利用する人について
本アプリは、
6. お問い合わせ
本ポリシーと
発行者: 今井涼晴
7. 改定
機能の
Shibuya Machimachi Privacy Policy
Last updated: September 27, 2026 · Published by Ryosei Imai (individual developer, Japan)
Summary
- No account. The only thing you type in is a nickname.
- Your location is sent only after both people have approved each other, and only while you are within 1.5 km of Shibuya Station, to calculate the distance and direction between the two of you.
- The other person receives only the distance, direction, and floor difference. Your raw coordinates are never delivered to them or to anyone else.
- The server temporarily keeps only your latest position during the meetup. It is deleted as soon as sharing is stopped, and the whole room is deleted automatically 3 hours after it is created. No location history is kept, and coordinates are never written to logs.
- The camera image (AR view) and device orientation are processed on your device only and are never sent or stored.
- Walking directions ("場所へ
行く " Go to a place / "道順で 案内" Directions) are computed on your device only; your position, destination, and route are never sent. - There are no ads, no analytics, and no tracking. We do not sell your data or share it with third parties for advertising.
1. Information we handle and why
Nickname — shown to the one person you meet (up to 20 characters; it does not need to be your real name). Deleted with the room after 3 hours.
Precise location — never sent before mutual approval, and never sent or stored while you are outside the 1.5 km Shibuya area. The server (Cloudflare Workers / Durable Objects) keeps only each person's latest position (latitude, longitude, accuracy, timestamp) to compute distance and direction; each update overwrites the previous one. Tapping "Stop sharing" deletes both positions immediately, and all room data is deleted 3 hours after creation. The approximate pin shown on the other person's 3D map is computed on their own device from their own position plus the distance and direction.
Current floor — optional; used only to show a floor difference. Deleted with the room.
Meeting spot — optional; if either person picks a spot, only the spot's identifier (e.g. Hachiko statue) is sent to the server and shown to both people. No coordinates are sent. Deleted with the room.
"We met!" judgment — only numbers (distance in meters, same-floor flag, elapsed time, location accuracy, seconds since the last update, whether both people tapped the button) are sent to the judgment service TypeSafe AI Jev. Coordinates and nicknames are never sent. If the service is unavailable, the app judges by distance only.
Network information — traffic goes through Cloudflare, which processes network information such as IP addresses. To prevent abuse, the number of meetups created is rate-limited using a short-lived hashed value of the IP address. The developer does not store or view IP addresses.
Camera and orientation — used on-device only for the AR view and the direction arrow; never sent or stored.
Walking directions — computed on your device only. Your position, destination, route, and the floor you pick for directions are never sent or stored (in a meetup, the floor you select is sent only to show the floor difference, as described above).
2. Map data
When the 3D map is shown, the app loads map images directly from the Geospatial Information Authority of Japan (GSI tiles) and, in the high-quality view, building data from the PLATEAU distribution server. These servers receive ordinary network information (such as your IP address and the requested map area). Shop data (OpenStreetMap) and simplified building data are bundled in the app. The walkway data for directions (OpenStreetMap) is loaded from this site as a public file.
3. Sharing with third parties
We do not provide your information to third parties except as required by law. Cloudflare (server) and TypeSafe AI Jev (judgment; no coordinates or nicknames) are used only to run the app's features.
4. Who the app is for
The app is for meeting friends and acquaintances you already know. It has no feature for finding or meeting strangers. An invite link works only once, and each meetup is limited to two people.
5. Contact
Questions about this policy or the app: kaeru3160@gmail.com. The source code is public on GitHub.
6. Changes
We may update this policy when features or laws change. Updates will be posted on this page with a new "Last updated" date.