Isshin Ittai and Niten Santen (一進一退と二転三転 – Back-and-Forth and Change Again and Again)
Isshin Ittai and Niten Santen 「一進一退」と「二転三転」 The four-character idiom isshin ittai (一進一退) describes that things do not progress smoothly or
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niten santen