Found in translation. :-)
Raykoke (Ray-ko-key) or, in Russian, Stolpovoy volcano eruption has caused several Japanese airlines to change routes over the Northern Pacific, according to NHK. Japanese weather service warned that the ash cloud has reached the altitide of 13,000m. According to Himawari observation station the cloud is moving towards the Aleutian archipelago. Japanese weather servide warned that volcanic ash can clog and stop the engines and damage cockpit windows.