Sony announces in Japan also the new slimmer Sony PSP, but has some additional treats in store for their Japanese gaming fan community.

The slim Sony PSP will be available in six colors. The U.S. and Europe will only see three colors.
Additionally Sony announces a digital TV receiver accessory for the Sony PSP. The 'Wansegu' receiver allows Japanese Sony PSP users to watch TV on the go - pretty nice. The six colors for the new Sony PSP in Japan are: piano black, ceramic white, ice silver, rose pink, lavender purple and light blue.
The new slim Sony PSP will be available in Japan on September 20th for 19,800 Yen (~$162). The Wansegu digital TV receiver (PSP-S310) for the Sony PSP will sell for 6,980 Yen (~$57).
Via this Sony press-release (Japanese).

See also the new Sony PSP details for the U.S. and Europe.