I'm planning a trip to Japan next spring-ish, but it turns out both my passports are expiring in September 2012 and I'm unlikely to be able to renew them before I leave. Now, I gather that Japan does not have the usual "passport must be valid for six months after entry" requirement, but I'm unable to find proof of this in writing -- can any enterprising FTer find some? Proving a negative isn't easy, with eg. Timatic simply silent on the issue.