Sorry for the last-minute notice but tonight is the last night this year to see Nabegataki lit up. Even if you can't go tonight, though, it's a great place to visit in the daytime throughout the warm summer months and into the fall.
For more information in English, see
https://www.tripadvisor.com/Attraction_Review-g1121535-d1960940-Reviews-Nabegataki_Falls-Oguni_machi_Aso_gun_Kumamoto_Prefecture_Kyushu_Okinawa.html
By the way, Olivia posted about Tsuetate, which is also in the Oguni area:
https://www.facebook.com/Kumamotoi/photos/a.607228756017227.1073741827.123734781033296/1849943821745708/?type=3&theater
The two places are close enough to each other to see both on a daytrip to Oguni.
-- Kirk
http://www.news24.jp/articles/2018/04/01/07389394.html
幻想的…鍋ヶ滝でライトアップ始まる 熊本|日テレNEWS24
熊本県小国町の鍋ヶ滝で先月31日から滝のライトアップが始まり、多くの観光客でにぎわった。