Ise Bay has an average depth of 19.5 metres and a maximum depth of 30 metres toward the centre. The mouth of the bay is 9 kilometres wide and is connected to the smaller Mikawa Bay by two channels: the Nakayama Channel and the Morosaki Channel. Mikawa Bay is subsequently joined to the Pacific Ocean[1] by the Irako Channel, which ranges from 50 to 100 metres in depth.