A couple of useful tips for living in Japan – cheap haircuts & the kimono revisited.

Famous cheap hair saloon, '1000-Yen-Cut' in Japan: QB HOUSE (only in Japanese)
If you get your hair cut at a famous hair saloon in Tokyo, it will set you back around ¥6000 and in the countryside it will cost you about ¥3000.
But if you don't care about anything except for the price - like not getting your hair washed or being able to choose who cuts your hair - then I would recommend going to QB House. Many young hairdressers who have just graduated from hair-design or beauty schools and who are really hip work there. Of course most of them cannot speak much English, so I would recommend you to take some photos of how you want your hair done (the stylists at QB house suggested that). When you go in you have to purchase a card for 1000 yen and give it to the hairdresser who will cut your hair. You can find these hair saloons near large stations or big shopping malls.

Cool kimono fabric dresses: Around Shimo-Kitazawa a.k.a. Shimo-Kita
Shimo-Kita is an area in Tokyo popular among cool young people. Shibuya and Harajuku are also fashonable but most people in those places are from the countryside not from Tokyo. Most people in Shimo-Kita live around there, and have their shops there and lots of street performers, rock-bands and theatrical companies are based there. Shimo-Kita is one of real “live” places in Tokyo.
And some of those people create unique fashions. Kimono dress shops are one example of this. These shops can be found around the Shimokitazawa station. They sell skirts, dresses, aloha-shirts, which are made from antique kimono fabric, about 100 years old. Of cource it's expensive (most of them cost over US$100) but it's worth the price. If you don't find what you like, you can get something made. You should choose your favourite fabric and tell the young tailer what kind of patterns you like. After around a week, your original dress will be ready. Also you can get antique recycled kimono at such shops.