Osaka Metro is planning to build 23 sets of its new 400 Series subway cars along with 10 sets of 30000A series to replacing its aging 20 and 24 Series subway cars on its Chuo Line by 2023 in preparation of the World Expo in 2025. Let's just say the looks for the 400 Series is quite out there at the very least.
https://subway.osakametro.co.jp/news/news_release/20211209_400kei_30000Akei_dounyu.php