- Jodo Shinshu Shinrankai
- 2964.27 square metre(s)
- Japão (Imizu)
The largest tatami room is 2,964.27 m² (31,906 ft²) and was achieved by Jodo Shinshu Shinrankai (Japan) at Nisenjo in Imizu, Toyama, Japan, on 23 September 2019.
The tatami room consists of 1,911 tatamis divided into 21 sections which fills up 72% of the room.