In Romaji:

Maruha medama
Maruha kirei
Kuroibudouno
Amaiagi
Sankakuha gikan
Sankakuha hayai
Sakana no shippono
Furuekata

Shikakuha Sora
Shikakuha Hirui
Hanawo kandera
Iinaoi

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751582

English Translation:

Circle's an eye ball
Circles are pretty
A wonderful taste
Just like black grapes
Triangle's a moment
Triangles are fast
The fish's tail
Trembles

Square's the sky
Squares are wide
Flowers are good to chew
It's good that there are many

3.14159 2653589 7932384
626433 8327950 2884197 1693993
751582