each watercolour on postcard

i) signed with the artist's monogram lower left; further inscribed by the artist [in Japanese] and stamped on reverse
ii) signed with the artist's monogram and dated '64' lower left; further inscribed by the artist [in Japanese] and stamped on reverse
iii) signed with the artist's monogram lower right; further inscribed by the artist [in Japanese] and stamped on reverse
iv) signed with the artist's monogram and dated '1969' lower left; further inscribed by the artist [in Japanese] and stamped on reverse

i) 10.3 x 15 cm (4 x 5 7/8 in.)
ii) 9.3 x 14.4 cm (3 5/8 x 5 5/8 in.)
iii) 9.3 x 14.1 cm (3 5/8 x 5 1/2 in.)
iv) 14.9 x 10.3 cm (5 7/8 x 4 in.)

ii) Executed in 1964.
iii) Executed in 1966.
iv) Executed in 1969.