Some 60 pieces of art by inmates on death row were displayed in a Diet members' office building Tuesday with the aim of getting lawmakers and their aides to take a harder look at capital punishment.

The one-day exhibition, sponsored by groups opposed to the death penalty, marked the 20th anniversary of a U.N. pact aimed at abolishing capital punishment, organizers said.

The works, including paintings, had been submitted to an artistic exhibition of death-row inmates that started in 2005 with ¥10 million left in a woman's estate.