i ordered kaido battle before its US release it was like 70 shipped or osmething for my modded ps2.. i never beat it shit got borring.. i dunno i find the genki games to get repeative..
Last cool genki game in my opinion was Racing Battle C1 Grand Prix for PS2 .. never came out here but you could find torrents.. it was like Tokyo extreme racer you had wangan, and you had track racing, time attacks and drift.. it had it all.. last year i found the soundtrack on amazon and bought it... Had some good car customizing too. But the physics suck with all Genki games, but they all have cool intros that get you excited.
http://www.youtube.com/watch?v=i5sEWHPj_3o
One thing i like about Genki tho is they always showed tuning as an art/lifestyle... Not like US games where its a cool trend that you have to do.