It is possible to complete this multi cache at night. You will need a torch to help you find the final, physical cache. It is also possible to find this cache during the day in any other month other than April. But it won't be as beautiful.
夜にキャッシュを見つけれる。最後のキャッシュを見つけるには壊中電灯が必要となる。夜じゃなくてもキャッシュは見つけれる。 四月は花火の時期で一番美しい時期なんだけどいつでもキャッシュを見つけます。
Takada Park:
Takada park was originally the location of Takada Castle. Built in only four months in 1614, there are three things that distinguished Takada Castle from other castles. Firstly, it was built without a stone wall, secondly that it was built on a flat, and thirdly that it did not have a castle tower. Instead, Takada castle had Triple Turrets. One of which has been reconstructed in modern times and stands as a centerpiece of the park.
Takada Park is now famous for being one of the top three places to view cherry blossoms at night. The best time to view the blossoms is in Mid April when there are 4,000 cherry blossom trees in full bloom, 3,000 Japanese Traditional Lights, 300 food stalls and many matsuri activities taking place.
GOOD LUCK!