IF THIS WAS GLITCHED FOR YOU, IT IS NO LONGER GLITCHED AND VERY MUCH OBTAINABLE. A patch was released a few days ago and fixed the unobtainable achievements, and good news....Japan-Easy levels count!!
If you were like me, and already had Japan-4 Easy: Muzukashii Wheel completed in under 1:40, all you have to do is go back, play the level again, and make sure you finish WITHOUT skipping an area so your time counts. I played through my first time and finished in 2:06 and the achievement still popped, because the game saves your best time for completing the level all time, just need to complete it again so it saves that time. Good Luck!! Any down votes please comment why.