How old was Keiichirō Akagi in Duel of Akiba?

Keiichirō AkagiKeiichirō Akagi was 20 in Duel of Akiba

Birthday: Mon, May 08 1939 –
Tue, Feb 21 1961

Hideaki NitaniHideaki Nitani was 30 in Duel of Akiba

Birthday: Tue, Jan 28 1930 –
Sat, Jan 07 2012

Mihoko InagakiMihoko Inagaki was 22 in Duel of Akiba

Birthday: Sun, Feb 20 1938

Taiji TonoyamaTaiji Tonoyama was 44 in Duel of Akiba

Birthday: Sun, Oct 17 1915 –
Sun, Apr 30 1989

Akinori MatsuoAkinori Matsuo was 31 in Duel of Akiba as 'Director'

Birthday: Mon, Nov 05 1928 –
Mon, Jul 12 2010

Naozumi YamamotoNaozumi Yamamoto was 27 in Duel of Akiba as 'Music'

Birthday: Fri, Dec 16 1932 –
Tue, Jun 18 2002