Largest multi-sudoku puzzle
Who
Dwango Co., Ltd., Wakara Co., Ltd., Sugakubunka Co., Ltd., Timeintermedia, Inc.
What
280 total number
Where
Japan (Chofu)
When

The largest multi-sudoku puzzle consists of 280 sudoku grids and was achieved by Timeintermedia, Inc., Sugakubunka Co., Ltd., Wakara Co., Ltd. and Dwango Co., Ltd. (all Japan) in Chofu, Tokyo, Japan, on 7 October 2018.

The attempt was taken place as a part of a math event called MATH POWER since 2016.