Moats and Walls 堀と石垣

Edo Castle had over 20km of moats including the inner and outer moats. There is a surprising number of these left today even though they are now simply parts of rivers, canals or hidden under the Shutoko Expressway. Parts of stone walls from these moats and other structures also exist throughout the city even though people who pass by them every day have no clue that they were once a part of Edo Castle.