My friend has a unsigned Wakizashi with the Tsuba pictured below. I'm curious if anybody has an idea when and where the Tsuba was made. Thanks in advance.

This is my first post. A friend has a wakazashi that her father brought back from Japan in the 1950s. I'd appreciate any help on translating the kanji.

Aloha from Hawaii.

Harada

With Andy's information I was able to find a similar Mei. Added an additional slide (Eureka) that was accompanied with the following writeup:
Katana: Musashi Daijyo Sakon Korekazu (1st generation)
Katana in Shirasaya(NBTHK Hozon Paper)
Signature: Musashi Daijyo Sakon Korekazu (１st　gen)
The blade was polished.
Habaki: syakudo single habaki.
Blade length : 69.6cm or 27.41inches.