Where does “Romajikai” come from?

Romajikai (English) comes from Japanese ローマ字会, from Japanese ローマ字, from Japanese ローマ, from Italian Roma, from Latin Rōma — Rome and/or Constantinople (the latter as "Nova Roma").

Romajikai (English): A society founded in the 19th century to promote the romanization of the Japanese language

Definitions

A society founded in the 19th century to promote the romanization of the Japanese language

Ancestry of “Romajikai”, step by step

Step	Language	Word	Meaning
1	Japanese	ローマ字会	—
2	Japanese	ローマ字	Latin alphabet; romaji
3	Japanese	ローマ	Rome, Roman
4	Italian	Roma	Rome
5	Latin	Rōma	Rome and/or Constantinople (the latter as "Nova Roma")

Every word from Latin Rōma →Every word from Italian Roma →Every word from Japanese ローマ →