Where does “お段” come from?

お段 (Japanese) comes from Japanese 段, from Chinese 段.

お段 (Japanese): the fifth and lowest-graded column of the 五十音図, consisting of the ten kana お/オ, こ/コ, そ/ソ, と/ト, の/ノ, ほ/ホ, も/モ, よ/ヨ, ろ/ロ and を/ヲ

Definitions

  1. the fifth and lowest-graded column of the 五十音図, consisting of the ten kana お/オ, こ/コ, そ/ソ, と/ト, の/ノ, ほ/ホ, も/モ, よ/ヨ, ろ/ロ and を/ヲ

Ancestry of “お段”, step by step

お段 traces back through two separate lines of ancestry.

via Japanese 段

StepLanguageWordMeaning
1Japanese段steps (up and down); stairs
2Chinese段—

via Japanese お

StepLanguageWordMeaning
1Japaneseお諾 yes, alright, okay; オ a sign used in some...
2Middle Chinese惡—
Every word from Chinese 段 →Every word from Japanese 段 →