What are the bid increments?

Any new bid must be greater than the current high bid. The additional amount you're required to bid depends on the price of the item being auctioned. (In other words, bid increments are determined by the item's price.) For example,
if you want an item with a current price of ￥1000, then you must bid at least ￥1100 (See also automatic bidding.)

The table below shows the required bid increments for Yahoo! Japan Auctions:

Price of Item	Increment
￥1  －  ￥999	￥10
￥1,000 － ￥4,999	￥100
￥5,000 － ￥9,999	￥250
￥10,000 － ￥49,999	￥500
￥50,000  and above	￥1000

The bid increment can't be changed by the seller or the bidder. The bid increment will only be changed as the current high bid increases.