I was in Japan earlier this May. Here is the Tombstone of Masamune (正宗) in Honkakuji Temple (本覚寺) and Masamune Kogei store in Kamakura. This store is owned by Tsunahiro Yamamura who is the 24th generation of Masamune.
Here is the map of Kamakura that shows the location of the Honkakuji Temple (circle) and Masamune Kogei store marked the circle with X in it.
This map is from the Kamakura station information center.
The direction to the Masamune Kogei store (marked circle with X on the map)
Take Yokosuka Line from Tokyo (approximately one hour)———– Get off the train at Kamakura-Eki ————Exit from the East exit ———Take Komachi Dori street (narrow street toward left) ———-the first narrow street to the left ——— Cross the railroad track ——— Very short distance from the railroad track ———On your left, you see the sign of Masamune kogei store.
Mr. Yamamura and I
The direction to the Honkakuji Temple (本覚寺 )
Take Yokosuka line from Tokyo station (approximately one hour) ———-Get off the train at Kamakura-Eki ———-Exit from the east exit ———-Go straight and cross the road ———-Turn right and go until you see the post office ———Turn left on the side of the post office (Honkakuji temple sign is at the corner of the post office) ——— Honkakuji Temple is a short distance from the post office.
All of the pictures below are from Honkakuji Temple.
Below are Masamune’s tombstone.
Both tombstones are the memorial tower erected for Masamune in Edo Period