|KEY WORD : architecture / castles|
| An arrowroot vine fortress. A temporary fortification
that dates to the ancient period. Similar to a briar tree fortresses *ibaraki
茨城 and rice plant fortresses *inagi
稲城. The tough vines were spread around the fortress to provide a primitive defense
against enemy incursions. The earliest mention is in the NIHONSHOKI 日本書紀 (Chronicles
of Japan), which dates from the early 8c.
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