褌一つ、ふんどし一つ
ふんどしひとつ
fundoshihitotsu
JMdict entry #2668950
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expressions (phrases, clauses, etc.)noun (common) (futsuumeishi)
(wearing) a loincloth alone; nothing but a loincloth
see: パンツ一丁, ふんどし一丁・ふんどしいっちょう