How about NHK (Nihon Housou Kyoukai: Japan Broadcast Association; Like as BBC in UK)?
They will be interested in the footage.
https://www.nhk.or.jp/nhkworld/engli...act/index.html
Also Kiyosato Photo-Art museum
Kiyosato Museum of Photographic Arts. or Tokyo Photograph Museum
TOKYO METROPOLITAN MUSEUM OF PHOTOGRAPHY"SYABI" will be interested.