A pair of action-packed Ultraman Monster paintings by Toshio Okazaki were published in Shōgakukan's 1979 edition of Ultra Kaiju (Shōgakukan Nyūmon Hyakka Series #97).

Ultra kaiju painting by Toshio Okazaki --
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Ultra kaiju painting by Toshio Okazaki --
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Ultra kaiju painting by Toshio Okazaki --
Alien Guts, Windam, Gyango, Black End, Kingsaurus III, Bemstar

Ultra kaiju painting by Toshio Okazaki --
Alien Icarus, Gomora, Muruchi, Alien Baltan, Alien Magma, Kemular

Ultra kaiju painting by Toshio Okazaki --
Dancan, Giradorus, Astromons

Ultra kaiju painting by Toshio Okazaki --
Gandar, Gabora, Alien Metron, Agira, Antlar, Seabozu, Woo

Ultra kaiju painting by Toshio Okazaki --
Gubira, Takkong, Pestar, Gamakujira, Bemular

Ultra kaiju painting by Toshio Okazaki --
Eleking, Alien Kuuru, King Joe, Zemistiar

Ultra kaiju painting by Toshio Okazaki --
Geronimon, Jirass, Alien Pegassa, Dino-Tank

Ultra kaiju painting by Toshio Okazaki --
Pegassa, Hydra, Black King, Mephilas, Verokron, Starbem Gyeron, Red King, Dorako, Godola

[Source: Ultra Kaiju (Shōgakukan Nyūmon Hyakka Series #97), 1979]