Wait a minute... imagine for a moment that some Japanese family HAD accepted the message of the WTB&TS ten years ago: look at all the "old light" they would have to unlearn just to keep up with the ever-changing menu on Jehovah's bounteous smorgasbord of fugu sashimi.
The Japanese are inscrutably efficient. The longer they put off having anything to do with the Watchtower, the fewer false teachings they will need to unlearn a week from now.
...and I think a LOT of Japanese are waiting eagerly for the Watchtower to promise them thhat in Paradise they will become WHITE.