Farfugium japonicum (L.) Kitam.

Family: Asteraceae
English: Silverleaf, Leopard plant (sp)
Japanese: ツワブキ [Tsuwabuki]

F. japonicum has been planted and encouraged to grow wild throughout the lowlands, because it is beautiful and the new leaf stalks are delicious when peeled and boiled.

References:
九州野山の花 片野田逸朗,2004：南方新社
米倉浩司・梶田忠 (2003-)　「BG Plants 和名－学名インデックス」（YList），http://ylist.info（ 2019年8月13日)