gunmajet.net

I don't know anywhere in particular, but you can usually ask for extra hot versions of both Indian and Japanese curry at most restaurants.

-Bahia
ALT Advisor
Gunma Prefecture
sm-bahia at pref.gunma.jp

I share you same enthusiasm for the "hotness".

There is an Indian restaurant called "Muhatmas". There is one in Takasaki across the street from Don Quiotes and Amazon Lingerie, and one in Maebashi near the station. The food is excellent. On the menu they rate the spicyness with chili peppers next to the dish;1-5 peppers. I had a Chicken Masala that had a 4 pepper rating, and I think I started having visions of my ancestors. It was HOT! I loved it! They have a curry dish on the menu that is the only 5 pepper rated dish. I have yet to try it. But the 4 pepper dish knocked me on my ass!

You can also go to the Kaladi Coffee house in Aeon Takasaki or Keyaki Walk in Maebashi and they have a good assortment of REALLY hot sauces. I recommend Marie Sharps Habanero hot sauce. They have three kinds. The green kind, the red hot, and the bright red super hot one that says "Beware" on the bottle. No Joke, it's hot! I used to get it all he time, but the regular hot sauce realistically is plenty hot, so I get that now. The green stuff isn't that hot but it's SUPER TASTY! I usually have a bottle around my apartment at all times.

Also when you get ramen, sometimes they have a spicy one or you can ask them to spice it up a bit, and usually that'll get my blood pumping a little bit.

Give me heads up if you find a good Mexican food restaurant. That's the one thing I really miss!

There is a passable Mexican restaurant in Takasaki called Tio Tia. The food is authentic, I was really surprised to find mole on the menu and even more surprised that it was quite tasty. I was equally surprised to see nopales, although I did not order them. The downside is the food is really, really expensive. We're talking 200 yen a tortilla here. If you're missing 'real' Mexican food, give it a whirl... just be prepared to pay.

ティオティア
高崎市田町２１
027-326-090

you can buy masa harina from the foreign buyers club (fbcusa.com)

I guess not being American myself, I've never thought of Mexican food when I think hot spicy food, but thank you all for the suggestions, and I am definitely gonna try some of them out! And if anyone would like to accompany me burn my tongue off, feel free to drop me a line!

I'm from So Cal as well and my dad is Mexican but that doesn't mean crap since he's the world's worst cook. I say all that to say my taste buds aren't as discerning for Mex food....and in fact...any food. Now that you know that, take what I say with a grain of salt.
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El Torito at Shinjuku. Been there plenty of times and the food was decent. Other folks in my party weren't too thrilled, especially at the prices. Margaritas were cool, as was the freshly made guac.
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There was a Cuban place...I think...that place was pretty good. Granted, it's not Mex, but at least it's a good change of pace from what's available in Japan. They have salsa nights there too.
Salsa Sudada - (bar/club)
7-13-8, Roppongi, Minato-ku, Tokyo
Phone: 03-5474-8806
and in looking for that, I found a bunch of places where you can salsa in TOkyo.
http://www.salsapower.com/cities/tokyo.htm
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more on mex food
http://www.metropolis.co.jp/tokyo/495/dining.asp

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JenCPark

Another recommendation for spicy South Asian cuisine: Jamuna Restaurant in Kiryu, which serves homestyle Indian food with a smile. It's reasonably priced and oishii! To get there, exit Kiryu station and take an immediate right down the main street; the restaurant is a few blocks down the road on the right-hand side, across from the Denny's.