Yes, several things are just wrong here, e.g. "…久保 becomes "Kubo" without the long vowel marked at all…" -- there is no long vowel! Just plain Kubo is correct.

Yes, several things are just wrong here, e.g. "…久保 becomes "Kubo" without the long vowel marked at all…" -- there is no long vowel! Just plain Kubo is correct. "Nihon-shiki and Kunrei-shiki optimize for a systematic, one-to-one mapping between kana and romanization. One kana, one romanization, always, with no exceptions." (Kunrei-shiki: exceptions! 猫は庭へ魚を運ぶ Neko wa niwa e sakana o hakobu) Also: "Romanization is a scaffold, not a destination." ? I TOO AM A HUMAN WRITER WHO WRITES WITH MY OWN FINGERS. But the history of the Romaji movement is indeed interesting - there were influential people who were quite serious about moving entirely to romaji at one point! It would have changed everything.