1000 yen is around £7.40 (GBP). I live in the UK, which by all accounts is an expensive country (though possibly not quite as expensive as Japan). I can live very well on less than £5 a day. Last summer I cycled 4000 miles around europe over a 3 month period and spent an average of £2 a day, including in Germany, France and Italy which are all expensive compared to some other places I visited. There are some key ideas behind eating cheaply in any country and some have already been covered.
Make sure you know which staples are subsidized. In the UK, bread and milk are subsidized (and vitamin supplemented). In Italy, pasta. In Germany it's bread rolls and cheese. I presume in Japan that at the least white rice will be subsidized, and so you will be able to buy in bulk cheaply. Seasonal vegetables are cheaper, so are local vegetables. If you can find out where local fruit and vegetable markets are held, get your vegetables there. Don't eat fruit.
Visiting some types of cafe just before closing time you can get free food. For example, bakeries in the UK have to throw away any unsold produce after closing time, so you can go and get free pastries and bread 5 minutes before closing. Sometimes it's not free but just very cheap. I'm sure there is a similar type of shop in Japan.
Again, I can't say for certain if this is true in Japan, but here you can save a lot of money by buying certain foods frozen. This seems to apply particularly to fish here, probably something different in Japan. Obviously they keep longer this way, but you need a freezer.
If I remember correctly, though Japan doesn't really have coupons like the USA apparently does (we don't have them here either), you do have loyalty cards. I'm pretty sure you can make a good saving by carefully investigating which stores have the best loyalty system to price tradeoff. Then make sure you buy from that store whenever possible, for the items you know are cheapest there. Over time it will benefit you to stick to one shop as you can redeem your loyalty points. Wrightak has an article about it on his blog.
Oh yeah, regarding your vitamin tablets. Take one a day but never ever leave the cap off - with just a tiny amount of moisture in the bottle, most vitamins will denature and become completely useless, and you might as well eat soil. Keep them in a dry place (e.g. not the bathroom cupboard).
Last edited by Blahah (2010 June 16, 9:39 am)