At the top of slope close to Nagata-cho Station used to be Akasaka-mon Gate of Edo Castle. Though the gate was removed in the Meiji period, parts of the stone walls are still there and we can see them.
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Current Akasaka Slope and remains of Akasaka-mon Gate -
Remains of stone walls of the gate -
It could be remain of the second gate (It’s called Korai-mon gate)
If we look closely at the stone walls, we can see that there are some marks.
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Part of remain of the gate’s stone wall -
The mark engraved on the stone 1 -
The mark engraved on the stone 2
There were moats on both sides of the slope. The Benkei moat on the north side still remains, however the moat that the south side has been reclaimed.
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Current Benkei Moat -
Benkei Moat with Benkei-bashi Bridge