This is the most powerful break in Izu. If size goes up, a hollow barrel will form and break in the middle. Under these conditions it is only recommended for upper lever surfers. There is a good constant left break on the left side and a good constant left and right break on the swell in the middle. When there is a west or south west swell there is a good break on the right side. If there is a south swell it will be the best conditions here. Conditions are not good if there is an east swell. Keep in mind that there are many rocks although there is a left beach called MAISO beach on the left side of the river. Be careful not to break your board when the size goes up here! From the latter half of July until the end of August there are lifeguards on duty from 8AM until 5Pm. Also, the surfing areas will be restricted. During this period there will be a fee for parking.