主しゅ浴よく槽そう

noun

main bath; main bathtub

Refers to the primary bathing tub in a bathhouse or public bath, as opposed to smaller or auxiliary baths.

• 銭せん湯とうの主しゅ浴よく槽そうは広ひろくて気き持もちがいい。

  The main bath in the public bathhouse is spacious and feels great.