Since you listed Japan.. You might also wanna consider Korea.. They have loads of interesting places.. These are just a few:-

Seorae Village
Petite France
Jeju Island
Kyeong-Wha Station, Jinhae
Seongsan Sunrise Peak
Ggotji Beach
Bomun Pavilion, Gyeongju
Juknokwon, Damyang
Yeojwa Stream
Hwangmae Mountain
Nami Island