Oh, it's my turn to pour out the knowledge I accumulated when I spent my years at Waseda! Note, it's been a bit over three years since I graduated, but these places were there when I entered college in 2008 and they were still there last time I visited Takadanobaba last year.
Cheap/good restaurants:
- Kitchen Otoboke (キッチンオトボケ
has huge portions for all their food, and it's super cheap. Exit the Waseda University main gate and turn right, walk until you get to the Waseda-doori junction. It's right on the corner. Price is around 400-600 yen per meal.
- Budouka (武道家
is by far the best Yokohama-style ramen place I have ever had the pleasure of eating at. I ate there at least once a month while I was in college. Soup has a very thick and oily taste, but if you aren't into that you might want to skip it. Price is around 800 yen per meal.
- Musashino Abura Gakkai (武蔵野油学会
is a good place for abura soba (kind of like ramen with oil instead of soup). They have a point card system and if you get a certain amount of points you become eligible for free toppings for a year. I think the price was around 700 or 800 yen per meal.
- Meeyau (メーヤウ
is an ethnic curry place where the menu changes depending on the week. Some weeks have extra spicy curry if you are into that. I don't remember the price but it was around 700 yen for the meal.
- Takagiya (高木や
is another place if you like really spicy stuff. Their main dish is tsukemen, and their "normal" stuff is on the spicy side. They have a secret menu for milder and spicier dishes than they show on the normal menu. I think it was around 700 yen for the bowl.
- Thali-ya (ターりー屋
is an indian curry place right next to building 22 where most if not all of your Japanese language classes will take place. You can eat as much naan bread as you like during lunch. If you beat the record (my friend was a record holder for a while with 9 pieces I think) you get a free meal.
- Tinun (ティーヌン
is a Thai restaurant with good Thai food. It was the go-to Thai place for all my Thai friends, so it has to be at least slightly authentic. On the 16th every month they have a Thank You day where their main meals (ramen, green curry and more) is only 390 yen.
Then there's the bento place opposite to building 22. I don't remember the name of it, but their bentos are decently proportioned and cost under 500 yen IIRC.
As for supermarkets, there are a couple of them in Takadanobaba but they are slightly more expensive than what I would prefer. Watch out for the overpriced Aeon supermarkets if you are looking for cheap, not quality but decent stuff to prepare your meals. I spent three years at a dormitory where I didn't have to prepare my own food, but the one year I lived alone I used to go to a place called
Niku no Hanamasa (肉のハナマサ
, located between Takadanobaba and Ikebukuro. Niku no Hanamasa is a supermarket chain aimed at restaurant owners so they sell everything in bulk. You can get 2 kilograms of frozen Brazilian chicken for as little as 600~700 yen, so it's great if you are low on cash. Other meats are also inexpensive.
If you have access to a fridge at your dorm I recommend you also purchase something like a
slow cooker so you can cook large quantities of good food like curry, chili con carne, stews and so on and freeze it for later on. In a day you can easily make food that lasts you a week or longer if you want to save up. And let's be fair, these kinds of foods taste so much better when slow cooked!
I envy you, I really do. I wish I could go back to my college years and relive them. I have really fond memories of Waseda and the area around Takadanobaba. Although I enjoy my salaryman life in Osaka I still yearn for the good people I met and the good food I ate during those years.
If you have any questions concerning what to do around Waseda, Waseda University, social life (circles and so on), feel free to PM me and I'll respond when I can.
Edit: Added Tinun