You'll enjoy the wineries and monuments in Isawa Onsen. You might want to make time for a stop at Mars Yamanashi Winery or Daizokyo-ji Temple.
If you're spending some time in Shimo-yoshida, Arakurayama Sengen Park and Chureito Pagoda are top sights worth seeing.
While visiting Kobuchisawacho, you might make a stop by sights like Yatsugatake Resort Outlet Mall and Nakamura Keith Haring Collection.
While visiting Marunouchi, you might make a stop by sights like Maizuru Castle and Yamanashi Jewelry Museum.
Tatsugaoka is popular for its fantastic lake views, and you might make a stop by Fuji-Hakone-Izu National Park, a top place to visit in the area.