Tatoeba anata ga ite atashi wa yasashiku nareru toka
Atashi ga ite anata ga ite genki ni nareru toka
Tatoeba ganbattetara DOJI wo fundari shite
Atama nadenade toka karaka waretari toka

Omowazu soto ni detaku natte
Mae ni mo dondon susumete
Kao ga niyake sou ni naru no
Koraete suki kamo

Happy Days Happy Days
Anata to futari de
Happy Days Happy Days
Te wo tsunaide iru
Happy Days Happy Days
Omoide ga todoku you na
Happy Days Happy Days
Yume wo mita yo yume kai!

Tatoeba kidzukeba kokoro wo yuruseru nakama ga itari shite
Nanto naku yoyuu wo moteru you na yasashiku nareru toka
Tatoeba ganbattetara minna mimamotte kuretari toka
Tsurasa mo namida mo kawatte yuku SHUNKAN

Omowazu onaka ga suite kita
Hanauta mo dondon kanaderu
Sora ga kirei da to omoeru
LaLaLa ii kamo

Happy Days Happy Days
Donna koto demo kitto
Happy Days Happy Days
Dekiru you na ki ga suru
Happy Days Happy Days
Uta wo utatte irareru you na
Happy Days Happy Days
Shiawase ga hoshii naa
Donnan ya nen!

Happy Days Happy Days
Hoshi ga ippai no yoru
Happy Days Happy Days
Machiawase basho de
Happy Days Happy Days
Atashi wa DOKIDOKI no aji
Happy Days Happy Days
Anata wa ushiro ni ita
Happy Days Happy Days