There are few things as satisfying as making something yourself, particularly when it's useful and/or edible. While I only cut and assembled this meal, it felt like quite an accomplishment.
Markets in Japan sell sushi-grade fish all over the place. Around the time I finish work, the market on my way to the station has deep discounts in the fish department, so I sometimes pick up something for dinner. Today was a lucky buy, but I think I need a sharper knife. Still, tuna nigiri sushi is always welcome.