 Early on September 19 , the JMA upgraded Yagi to a typhoon . After completing the loop , Yagi 's track was influenced by a subtropical ridge located to the southeast of Japan . The typhoon continued to intensify and reached its peak intensity on September 21 with winds of 195 km / h ( 120 mph 10 @-@ minute winds ) with a minimum pressure of 910 hPa ( mbar ) , making it the strongest storm of the season according to the JMA . At the same time , the JTWC classified Yagi as a Category 5 super typhoon with winds of 260 km / h ( 160 mph 1 @-@ minute winds ) . On September 22 , Yagi passed by the islands of Iwo Jima and Chichijima as the storm recurved towards the northeast . With increasing wind shear , the typhoon began to weaken and also began to undergo an extratropical transition . Late on September 24 , the JTWC classified the storm as an extratropical cyclone and issued their final advisory . The JMA kept Yagi as a tropical system for another day as it weakened to a severe tropical storm . Early on September 25 , they classified it as extratropical . The remnants of Yagi continued towards the northeast and crossed the International Date Line on September 27 . The storm was last noted near the Aleutian Islands . 
