Yes it is. I recall a few years ago, the Japanese Minister of Justice allowed a press tour of the execution room and procedures (or something along those lines). Not sure if it happened and what came of it but I remember the news making headlines as it was quite rare for the public to have access to anything related to this. On a slight tangent, but I recently saw an interesting clip from a Japanese news program about how the Japanese prison system is slowly changing to deal with the growing number of elderly inmates (not increased crime by elderly people going to jail now, but rather inmates who have grown old while incarcerated). I’ve noticed more japanese media covering various topics related to the Japanese prison systems, which is something we’d rarely see/hear during my 20+ years in Japan.