Japanese talk, talent, and variety shows mainly use above-clothing lavalier mics, or wireless hand mics, depending on production or preference. Place the mic wherever works best, they didn't mind about aesthetics. Sometimes it's a combination of podium and wireless mics. Receiver antennae are remotely placed around the stage.
Signals are routed through an auto-mixer (Dugan etc) and compressor/limiter chain.
Overhead mics are usually used for producer, behind-camera crew, and audience reactions. Behind-camera crew reactions (laughter, shock, etc) are actually a big part of the mix.
i.e. If you hear mostly men laughing, that's the crew. If you hear mostly women, that's the audience.
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In that era, scripted drama shows were either boom only, or dubbed later. Wireless mics were mostly for TV and broadcasting.