Looking, yes, but I have not decided on a plan yet.
Mostly I'd be interested in the 400 and the 600 km, since I will have done 200s in January and March by then and will do a 300 km later in May (Mt Fuji). I know I won't be able to do the 400 km ride with AJ NishiTokyo this year as its scheduling conflicts with a business trip to Europe, so the AJ Kanagawa one in Tohoku one would be an alternative.
As for the 600 km, the AJ NishiTokyo 600 km will only be in September. I've tried three times and DNF'ed each time. I'm willing to try a different course, but not sure if this one will be any easier
Most of them you're complying with anyway: For example, I believe you have lights and a bell on your bike
There is the specific requirement for a reflective vest. I use the custom made one by Audax Saitama, which is cut high at the back so as not to obstruct the jersey pockets, it works very well. I can get one for you if you're interested, they're about 2000 yen.
Ah, those pesky red lights and pedestrian style right turns... As I see it, randonneuring clubs have to talk to the police to organize public events. They deal with restrictions on how many participants they can accommodate so as not to inconvenience other road users. I am very glad they are able to organize those events. As a highly visible participant wearing a randonneur vest, I would not want to cause them any trouble due to complaints from the public about cyclists not observing road rules, so I observe them