Nippon

Religion:
Nipponese religion is outstanding in the way that two different kinds of divine powers have been integrated. The two powers are the old faith Shinto, Way of the Spirits, and the gods of Law, especially Annu-Minato [Alluminas] and Oshiki. The alliance between the Earth Mother and the gods of Law in the God War seems to have somehow survived with the people of Nippon, best symbolized by Oshiki, son of Arianka and Ulric.
Historically, Shinto is the old religion with elements stretching back to the primitive religion of the pre-Slann Ages. The Law gods were known but didn't have many worshippers until the latter stage of the Tsien-Tsin period. Since then it has grown very popular within certain classes of Nipponese soceity.
Though the different powers is respected by most Nipponese (the exception is the rather big amount of secret Tsien-Tsin and other Chaos god worshippers), worship is tightly connected with society classes. Members of The Imperial Court are Shintoists. The samurai worship Oshiki and their ancestral clan spirits (shintoism). The intellectuals/monks worship either Annu-Minato or Vimta (rather new independent religion imported from Cathay). The lower classes (farmers, artisans and tradesmen) are shintoists.

Shintoism (Izana): Variant of the Old Faith. Central aspect of Shintoism is the belief that all things (dead and living) and phenomena posses a spirit, kami, of their own in the Realm of Spirits. Thus the material world is but a mirror of the constant influences of the kami upon one another. To have a good and harmonious life one must seek peace and harmony with his own kami and the kami surrounding him . This is obtained through respectful behaviour towards other kami (i.e. other people, animals and nature) and making peace with oneself through a life of purity and beauty.
Greatest among the kami is the emperor, tenno, of Nippon. The first tenno, Jintoki, was the child ofIzana, the very essence of all kami (laymen refer to this focus of Spiritual Power as the Sun Empress which is comparable with the Earth Mother of the Old Faith), and his semidivinity lives on in his descendant, the present tenno. Thus all living things should pay the deepest respect to the tenno of Nippon. First step down the ladder are the founders of the clans, the Ancestor Spirits. Every clan worship their clan founder.
Every location also has its own kami, and some places have extraordinarily great kami. Greatest among these is the kami of Fuji - the Holy Mountain. Other holy places are marked by torii, the Gate of Spirits[?].
The mysterious and secretive behaviour of the Old World Druids regarding the ways of the Earth Mother is not found among their Nipponese equivalents, the Shinto Priests. The Shinto Priests guide their followers towards the achievement of harmony and see to it that the kami of anything non-human is shown the proper respect.
Strictures: To obtain the harmony of the soul 

Ancestral heroes:

Oshiki [Bushido]: Oshiki is the child of Ashinaga [Arianka], the Goddess of Law & Discipline. The Nipponese belief that Ashinaga was fertilized by Jintoki, the Lord Eternal. Juan da Santor, an Estalian Verena Priest who lived in Nippon for 25 years and is the single most important contributor to Old World knowledge of Far East religion, claimed that Oshiki was fathered by Ulric.  This is rejected by the Nipponese theologians who are not familiar with the Young Gods and doesn't belief in their existence as autonomous gods (they regard them as specific aspects of Izana which cannot be separeted from the unified whole). 
Oshiki is the god of commitment, valor and honour. He prescribes that a man's life is his honour. The only way to regain lost honour is through the ultimate show of valor and commitment, seppuku (ritual suicide). Apart from that the best way to show your valor is through strength of combat. Followers of Oshiki stress that combat always takes place according toOshikido (the Way of Oshiki), a strict code which (among other things) means man-to-man combat to the death. No true follower of Oshiki would surrender as this would be the total loss of honour. Oshikido also prescribes total loyalty and commitment to your master.  Failing to do the bidding of your master would result in loss of honour.

Annu-Minato [Alluminas, Zen-Buddhism]: Well, look at Ward's wonderful article in the Archives.

Ashi-Naga [Arianka, Confutsianism]:

Kamida [Khaine]: Patron of the Ninja.

Chaos gods:
Tsien-Tsin [Tzeentch]: Lord of the Fifteen Devils, Master of the Five Elements [elaborate on the pagoda 		description from Red Thirst]
Zai-Neshi [Slaanesh]:
Great Gojira [Khorne]:
Catshit?!? [Nurgle]: