I've been living in Japan for around 7 years now, and basically the domestic flashlight market is a joke. The lights from the domestic manufacturers such as National (Panasonic) and Toshiba are about 5 years behind the curve. The CREE LEDs have just started showing up as of around last year.
The Gentos lights are rebranded Chinese lights, made by the same OEMs as Nuwai and others. I do own a few of them, and the build quality isn't particularly great when compared to Fenix etc.
The only really interesting light I've seen lately is one of the "GENTOS ULTRAFIRE" lights that has 7 LEDs in the head and is quoted at 500 lumens. Of course, it runs off of 7 "D" batteries and costs around $240 US. About the same size and shape as a WWII Panzerfaust, but probably a lot heavier if you use NIMH D cells (which apparently you can't get here domestically in capacities over 5000mAh or so)
Among people who use high-powered flashlights, Fenix and Surefire lights are the standard, with military reenactors/airsofters leaning towards Surefire.
Gradually we are seeing better lights in the electronics stores, but they don't compete in terms of power or price/performance, and most of the desirable ones are imports anyway.
EDIT: Correction - after looking at the link above, I believe it's one of the Megafire 1000 lumen models I was thinking of - gigantic monster of a light compared to my TK-40. 6 D cells...
The direct rechargeable one looks kind of interesting:
http://www.saint-gentleman.co.jp/list/?id=3_58&pid=203
I might consider carrying one of these if I ever got a job as a professional monkey hunter. I could smear myself with bananas and then use this more-than-4-pound monstrosity as a cudgel during the subsequent monkey wave attack.