埼玉県のひみつ（http://kids.gakken.co.jp/himitsu/l01/book/index.html）のパロディです。
流行には積極的に乗るスタイル。

It's a parody of The secret of Saitama Prefecture
Jumping on the latest craze is my style.
It's on the last panel at page 7; the text read "We'll go to Saitama Prefecture".