Souvenirs d’enfance, the first piano piece composed by Yoritsune Matsudaira, is a piano suite consisting of ten pieces. ‘Berceuse’, ‘Poissons rouges (Goldfish)’, ‘Boîte à musique (Music Box)’, ‘Mauvais rêve (Bad Dream)’, ‘Cheval de bois (Rocking Horse)’, ‘March [sic] (March)’ were first published in a musical magazine Ongaku Shinchō around 1930. Five of these were premiered by the composer at a concert ‘Forum of Young Composers’ held in 1930. When these pieces were republished in three volumes as part of the Zen-On Piano Pieces, ‘Les bulles de savon (Soap Bubbles)’ (1929) was added, and ‘Chanson pour jouer à la balle (Song for Playing with a Ball)’, ‘Jeux (Play)’ and ‘Pierrot qui joue de la ball [sic] (Clown Playing with a Ball)’ were included in OEuvres pour piano (Piano Works) published by Zen-On in 1991. There are many differences between the edition of 1991 and the older versions. Matsudaira says it was the strong impression given by Eugene Goossens’s Kaleidoscope played by Henri Gil-Marchex that led him to compose this suite, and the music of Debussy, Ravel, Poulenc, Tansman and Stravinsky also inspired him. In each piece, tonality is not clearly established. Instead, the sense of unity is created by the same phrase repeated and gradually modified, which makes the music not so much nostalgic as placid and restrained. There are no bars and beats in ‘Poissons rouges’, and parallel harmony can be found in ‘March’, which techniques will be both used in Matsudaira’s later piano works.