365 days whenever you can stay for 5,000 yen per night, budget hotels managed by wards and municipalities.
365 days will not change the price of budget hotels!
Province purse package travel plan, you can book in advance, did not pay two meals is 5000 yen a night.
There is ¥ 2500 for dinner, plus 500 yen for breakfast.
Can also specify the room type (Western style, and type), designated fee plus 1,000 yen.
These rooms will soon be booked light, so it is not necessary to plan as soon as possible.
This is the sample at izu, you can try order this accommodation next time you travel to izu.
refer to : 戸田市保養所 自由の湯（東伊豆）
This is the group for JA accommodation, they have many sightseeing spots at Japan.
refer to:http://www.ja-kyosai.or.jp/gokeiyaku/hoyo/
Also you can search for those government establishments can have cheap accommodation deals.
refer to:http://koukyouyado.net/tokyo/