We are aiming to kill two birds with one stone with this plan.

His words held a double surprise, like 'isseki-rokuto'.

This mineral is called ulexite and has special optical properties.

This stone is a mineral called clinozoisite.

This beautiful stone is a mineral called clinozoisite.

He succeeded in a difficult project with the spirit of 'ishi no ue ni mo sannen', which means great works are performed by perseverance.

He was able to achieve career success and fame after much hardship.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

His success is an example of the proverb 'one general achieves success at the cost of ten thousand bones'.

The proverb 'If you want to shoot the general, first shoot his horse' means that to achieve a big goal, you should start with small steps.