Japan sought technology from the Force Z wrecks

Did Japan search the wrecks of Prince of Wales and Repulse for British technology?

Yes, using large crane vessels, but little useful technology can be shown to have been recovered.

The Japanese Navy used Army vessels with unusually large floating cranes to investigate the wrecks of HMS Prince of Wales and HMS Repulse. The salvage effort appears to have sought useful British technology. Little can be proven to have been recovered, perhaps because battle damage and British demolition destroyed sensitive equipment. Japan's later destruction of its own research records adds another layer of uncertainty. Evidence of an attempted intelligence operation does not establish that it produced a major technical gain.