Tottoko Hamtarou OVA 1: Hamtaro no Otanjoubi - Mama wo Tasunete Sanzen Techi Techi  

Hamtaro: Hamtaros Birthday! - 3000 Hammy Steps in Search of Mommy, Hamutarou no Otanjobi, ハム太郎のおたんじょうび 〜ママをたずねて三千てちてち〜, Hamtaro: Hamtaro's Birthday! - 3000 Hammy Steps in Search of Mommy, Tottoko Hamtarou OVA 1: Hamtaro no Otanjoubi ~Mama wo Tazunete Sanzen Techi Techi~

In preparation for Hamtaro's birthday, he goes on a journey with Boss and Oxnard to meet his mother. However, before they arrive, it becomes clear that what Laura had previously told him about his origins may not be entirely accurate. Meanwhile, the other Ham-Hams plan a surprise party in honor of his special day.