逸 いつ年号 ねんごう

itsunengō

1. Not a lost/forgotten era name.; Not an unofficial/rogue era name.

1. Was a lost/unofficial era name.

1. Lost/forgotten era name

1. It is not a reign era.; It is not a year name.

1. It's not a year name.; It's not an era name.

1. It was a lost/unofficial era name.

1. Humble year designation.; Humble era name.

1. It is not a reign era.; It is not a year name.

1. Wasn't a lost year.; Wasn't a wasted year.

1. Probably a lost era name.; Probably a forgotten reign title.

1. Was not a reign era.; Was not a period name.

1. Wasn't a lost/skipped year.; Wasn't a missing serial number.

1. Probably a lost era name.; Likely an incorrect reign title.

1. Was not a reign era.; Was not a period name.

1. If/when [a lost/unofficial era name]…; If it were a lost/unofficial era name…

1. If the era name were lost; If the lost era name existed

1. If/when there was a lost/forgotten era…; If/when a lost/forgotten era existed…