https://phys.org/news/2018-06-lonely-furrow-dirt-farming-japan.html > On his farm outside Tokyo, the 32-year-old doggedly trudges along a line of lettuces, pulling up weeds by hand. > Shibakai says it is a "daily struggle to find ways to make a profit using a system you could call inefficient, where you have to pull all the weeds out by hand."