The IzuâOgasawara Trench (äźčąăťĺ°çŹ ĺćľˇćş, IzuâOgasawara KaikĹ), also known as IzuâBonin Trench, is an oceanic trench in the western Pacific Ocean, consisting of the Izu Trench (at the north) and the Bonin Trench (at the south, west of the Ogasawara Plateau). 
It stretches from Japan to the northernmost section of Mariana Trench.  The IzuâOgasawara Trench is an extension of the Japan Trench. Here, the Pacific Plate is being subducted beneath the Philippine Sea Plate, creating the Izu Islands and Bonin Islands on the IzuâBoninâMariana Arc system. 
It is 9,780 metres (32,087 ft) at its deepest.[ citation needed]
The xenophyophore Occultammina was first discovered at a depth of 8260 metres in the trench.