Typhoons tend to error eastward in the northern hemisphere, as that is the direction of the jet stream. This lil’ guy had first been centered on Seoul, than Pusan, and now through the Tsushima Straits, so it’s not inconceivable that it will land directly on Kumamoto tomorrow.
But it’s a weak typhoon - a typhette, if you would. Good practice for autumn, when the big guys will come rolling in. - William