This is my first submission~
I couldn't find a good version of Boku wa Kuma, until I fond this one :')
No credit to me, I found this one someone else did through a Japanese guitar tab site. 
(http://music.j-total.net/data/003u/003_utada_hikaru/020.html)
Thought I would post it here as well, so non-Japanese speakers can enjoy it as well.
Enjoy!~
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Capo - 3rd Fret

C (x32010@1)               Am (x02210@1)     GBoku (320003@1)wa kuma kuma kuma kuma
Dm (xx0231@1)           G (320003@1)   Dm (xx0231@1) G7 (320001@1)CKuruma (x32010@1)janai yo kuma kuma kuma
F (133211@1)      Em (022000@1)    FArukenai (133211@1)kedo odoreru yo
Dm (xx0231@1)    Em (022000@1)       FShaberenai (133211@1)kedo utaeru yo
C (x32010@1)               F (133211@1)   G7 (320001@1) CBoku (x32010@1)wa kuma kuma kuma kuma

C (x32010@1)               Am (x02210@1)     GBoku (320003@1)wa kuma kuma kuma kuma
Dm (xx0231@1)           G (320003@1)   Dm (xx0231@1)  G7 (320001@1)CKenka (x32010@1)wa yada yo kuma kuma kuma
F (133211@1)     Em (022000@1)     FRaibaru (133211@1)wa ebi furai da yo
Dm (xx0231@1)    Em (022000@1)       FZense (133211@1)wa kitto chokkoreeto
C (x32010@1)               F (133211@1)   G7 (320001@1) CBoku (x32010@1)wa kuma kuma kuma kuma

Bonjour!  Je m'appelle Kuma.
Comment ?a va?

C (x32010@1)               Am (x02210@1)     GBoku (320003@1)wa kuma kuma kuma kuma
Dm (xx0231@1)           G (320003@1)   Dm (xx0231@1)    G7 (320001@1) CFuyu (x32010@1)wa nemui yo  kuma kuma kuma
F (133211@1)     Em (022000@1)       FYoru (133211@1)wa "Oyasumi, Makura-san"
Dm (xx0231@1)   Em (022000@1)       FAsa (133211@1)wa "Ohayou, Makura-san"
C (x32010@1)               F (133211@1)   G7 (320001@1) CBoku (x32010@1)wa kuma kuma kuma kuma

F (133211@1)      Em (022000@1)      FYoru (133211@1)wa "Oyasumi, Makura-san"
Dm (xx0231@1)    Em (022000@1)     FAsa (133211@1)wa "Ohayou, Makura-san"
C (x32010@1)             F (133211@1)   GBoku (320003@1)wa kuma kuku kuma
   F (133211@1)  G7 (320001@1)  CMama (x32010@1)kuma kuma