This method is very effective.

His smile was ephemeral, disappearing in an instant.

He is leading a religious life.

He started cleaning voluntarily.

A new approach is needed to solve this perpetual problem.

His house has a very modern design.

His secondary role greatly contributed to the success of the team.

The Asuka Kiyomihara Code is one of the important laws in Japanese history.

Amanomurakumonotsurugi is a divine tool that appears in Japanese mythology.

He is writing a thesis on dialectical materialism.