Yasuhiro is my best friend.

Yasuyuki is my best friend.

I went to the station through the underground passageway.

Groundwater pollution has become a serious environmental problem.

It is reported that North Korea has conducted another underground nuclear test.

Sculptor is one of the constellations in the southern hemisphere.

Can I try on this dress in the fitting room?

He admitted that it is difficult to execute the plan, saying 'it is easier said than done.'

He decided to quit his job because it was a low salary.

His behavior became grounds for suspicion.