How to say this custom dates back to the 12th century. in Japanese
1)
このこの(kono) (n) this風習風習(fuushuu) (n) customのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question起源起源(kigen) (n,adj-no) origin/beginning/riseはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh１２no dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verb世紀世紀(seiki) (n) century/eraにに(ni) (prt) indicates such things as location of person or thing, location of short-term action, etc.さかのぼるさかのぼる(sakanoboru) (ok) to go upstream/to go back/to date back to/to trace back to/to make retroactive。。(。) Japanese period "."
