He was able to gain a large profit from a small investment, it was like catching a sea bream with a foot ruler.

He was able to make a large profit with a small investment. It's exactly what they mean by 'catching a sea bream with a shrimp'.

He used the strategy of 'throw a sprat to catch a mackerel' to gain a large profit from a small investment.

I often fish in the river on weekends.

This cloth is one shaku square.

This lumber is one shaku.

He measured the cloth using a bamboo measure.

My favorite fish is sea bream.

I went fishing for sea bream.

Mr. Tai is my neighbor.