Bushido
I think you would fit quite well in Bushido; you wanted to start a Japanese alliance, we are one, we are 25 members, and you want an alliance that size, you are active and we want active.
1)Bushido is a feudal Japan themed alliance. We orient ourselves around the Bushido code(Samurai Code). We are a multi-colored, high average NS alliance, that is semi-nuetral. We have been around for quite a while(around 3 years).
2)Our goals are to grow, stay safe, and make allies.
3)We have an MDP with GLOF, and ToA with URSA
4)We are currently recruiting high quality (active members, so you'll have to be active on our forums), and are initiating a massive NS jump program(by focus aiding our lower NS nations).
5)We are very open, and have a friendly government. If you are active, committed and loyal, opportunities for advancement will present themselves. We are meritocracy.
Links:
Forums: http://z11.invisionfree.com/BushidoAllianc...dex.php?act=idx
Wiki: http://cybernations.wikia.com/wiki/Bushido
In-Game stats: http://www.cybernations.net/stats_alliance...lliance=Bushido
If you are interested in learning more sign up on the forums; and feel free to message me in-game or on these forums.