theoretical knowledge without practical experience; Literally, “swimming lessons on a tatami floor”

traditional / conventional

tradition, custom

the above / the top (position or direction) / the surface of / superior in skill, age, level, etc.

in addition; furthermore / on top of (which)

way; method; manner

practice (learning or improvement of a skill)

practice

tatami; a tatami mat; Japanese straw mat

tatami mats / units of area as measured in tatami mats