New purchace

Hi every one
Purchasing new wakizashi, but not shore of a couple of things,
Can any one help me with the smiths name ?
thank you

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Reizei/Reisen

It reads:
"SUETSUGU REIZEI-SHI" (or SUETSUGU REISEN-SHI).
Probably related to Suetsugu Shigemitsu ???
Assuming it's authentic, it would be from the 1940's, but relatively high quality for that time period.
The smaller kanji at the bottom is "DAI", meaning "generation". Not sure what it means in this case.

Pete