There's a mistake in the translations, specifically for the Laser's ability description - it is correct for version 1.8.10 but has been changed in 1.9.0. The correct translation is "Each time batteries deplete, laser pierces through N enemies and ignites them for Ms, dealing fire damage equal to X% Damage Batteries capacity per second"
I've reset the translations of this string for the languages who had it translated incorrectly. The fixed translation for your language should appear soon after it is translated by someone through this website: https://infinitode.prineside.com/?m=translate_language&l=ja_JP