一緒に => together N5
一度に => all at once N3
一口に…といっても => Although in general... N2
Evaluate
一通り => Basically, (get) over, done N2
Base, base
ようになる/なくなる => Become… N3
Time, Situation
までになる => becoming ~ N2
Reach level
一気に => in one go; without stopping; all at once; immediately; instantly; right away ~ N2
一方だ => more and more; continue to ~ N2
ご...になる => To do (Honorific) N3
Respectful, humble
お...になる => to do (honorific) N3
Respectful, humble
ままになる => Just let... N4
Continuous
一応 => more or less; pretty much; roughly; tentatively ~ N2