June is the rainy season and hydrangea season, so Kamakura and Hakone (Kanagawa), Yatadera and Hasedera (Nara) are recommended.
https://www.japan-guide.com/e/e2166.htmlhttps://kamakuratrip.com/ajisai/https://www.japan-guide.com/e/e5200.htmlhttps://www.hakonenavi.jp/feature/6916http://www.yatadera.or.jp/ajisai.htmlhttps://www.hasedera.or.jp/event/However, many tourists visit.
June is the rainy season, but the hydrangeas that get wet in the rain are beautiful.
According to the information posted on the Yatadera website, the following is the result of experts ranking the hydrangea spots that look good in photos in 2019.
qWest Japanr
1 Kobe Municipal Arboretum (Kobe City)
2 Yata Temple (Yamatokoriyama City, Nara Prefecture)
3 Hasedera Temple (Sakurai City, Nara Prefecture)
4 Huis Ten Bosch (Sasebo City, Nagasaki Prefecture)
5 Maizuru Natural and Cultural Gardens (Maizuru City, Kyoto Prefecture)
qEast Japanr
1 Hakone Tozan Train (Hakone City, Kanagawa Prefecture)
2 Michinoku Hydrangea Garden (Ichinoseki City, Iwate Prefecture)
3 Shimoda Park (Shimoda City, Shizuoka Prefecture)
On a different note, Hokkaido is not affected by the rainy season, so if you want to go to a sunny place, Hokkaido is also recommended.