Limits
| Item | Limit |
|---|---|
| Area | Tokyo's 23 wards. The map cannot be moved outside the Tokyo area. |
| Year | Cannot be chosen on screen. REINFOLIB is fixed to 2024, and e-Stat to the 2020 census and the 2025 preliminary count. |
| Ward data table | Shows up to the 12 most populous wards. |
| 「区別平均地価」 | Shows up to the 10 wards with the highest average land price. The land price sample covers 16 wards. |
| 「年齢構成」 | Shows up to the 8 most populous wards. |
| 「路線別利用規模」 | Shows up to the 8 lines with the largest total ridership. |
| Lines per station | Shows up to 3 lines per station; the rest appear as 「+」 and their count. |
| Stations on the 「交通」 tab | The top 50 stations by number of lines. |
| Zoning on the 「災害」 tab | Shows up to 5 categories; the rest appear as 「他 {n} 区分」. |
| Interface language | Japanese only. |
| Export | There is no control that exports data to a file. |
| Retention of fetched data | Kept for 24 hours after fetching, per server process. |
| Map | Not shown in a browser that cannot use WebGL. |