Apparently these are pretty old news, but JR Kyushu had repaired the KiHa 220-1102 DMU car, which suffered flood damage back in 2020 and repurposed it as an inspection train (BE220-1) to replace its aging MaYa 34-2009 inspection car.
https://www.jrkyushu.co.jp/news/__icsFiles/afieldfile/2023/10/26/20231026_big_eye.pdfSL Hitoyoshi will officially wind down service and has its last run on March 23rd.
https://www.jrkyushu.co.jp/common/inc/news/newtopics/__icsFiles/afieldfile/2023/02/24/230224_arigatou_sl.pdf