On September 14, 2025, Toki announced her departure from Aldious.
On 9 September, the band officially announced the release date for Optimize , slated as a five-track EP that released on 24 October. Simultaneously, the band announced two additional Asian dates in Taipei , Taiwan , and Hong Kong scheduled to take place at the beginning of November 2025.
On September 8, 2025, it was announced that Shinya had been diagnosed with a brain tumor, and that, because the radiation therapy he would be undergoing could impair his mobility, his former protégé and Siam Shade drummer Jun-ji would be filling-in for him at Luna Sea’s upcoming Lunatic Fest that…
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finally in Tokyo at Toyosu Pit on August 13
in Osaka at Umeda Club Quattro on August 8
On 6 August, the band released ” Chasing Shadows ” as the second single from Optimize .
In August, they headlined the Incheon Pentaport Rock Festival in South Korea.
Yoshi, Toki and Sawa once again performed with Aruto and Re:NO in Nagoya at Electric Lady Land on August 1
Versailles’ first performance following Yuki’s departure was a selection of songs at Kamijo’s July 18, 2025, solo concert at Line Cube Shibuya , which commemorated his 30th anniversary in music. They were supported by D drummer Hiroki.
On 11 July 2025, the band announced their fifth extended play Optimize , that would be released in autumn of the same year. Concurrently, the band announced a One Man Tour across Japan to promote the release.