A Tokyo museum housing a tuna boat that was coated with radioactive fallout from an American hydrogen bomb test in 1954 is fighting quietly to remind people about the horror of nuclear weapons.

Crew members of the Fukuryu Maru No. 5 who sickened and died are memorialized at the museum, which marks its 40th anniversary on Friday.

Only five of the 23 former crew members are still alive, and 82-year-old Matashichi Oishi, who has been the most active in recounting what happened, is now frail.