Please tell me the way to solve this problem.

We are considering introducing a new voting system.

Learning a new input method is difficult.

The police used a water cannon against the demonstrators.

He clutched my hand in a firm grip.

He looked at her with his eyes looking upward.

This document is written using historical kana usage.

He is learning the phonetic kana usage.

He threw the newspaper into the wastepaper basket.

He is researching about Jion Kana usage.