I am looking for a song

Hello, I heard a song in Kabukicho in the street, I want to find this song because it means a lot to me, it is a good memory from my trip to Tokyo. I have a Youtube link, please if someone can tell the lyrics or if anyone knows anything about the song, I would be grateful to know any information regarding the song.

Here is the link: https://www.youtube.com/watch?v=YkexlmY-xyU

Thank you for your time,

Ariane

It is some kind of cover version of "Oji no Jiman no Orion Beer" by Begin, a popular band from Okinawa about the local Orion Beer from Okinawa:
https://www.google.co.jp/search?q=begin+orion+beer

Song title "オジー自慢のオリオンビール" is correct,
but above title spelling is a bit wrong, NOT "oji no jiman no", "ojii jiman no" is,
no need first "no(=of)", last "i" is long tone,
"ojii" means "grand father", "jiman no" means "proud of",
"Orion Beer" is famous local brand beer in Okinawa. (not in Tokyo)
https://www.orionbeer.co.jp/en/
Of course, used as their CM song many times.
https://www.orionbeer.co.jp/company/cm.html
Original Japanese lyrics and vid like karaoke :
http://j-lyric.net/artist/a000775/l00af7d.html
https://youtu.be/uS72NswPJLw
Song title looks like a beer's promotional song,
but this song means "I(We) love beer-loving grandfather" as my family.

Although the title of the song matched, but couldn't identify who is singing.
Original is male vocal song. ("Begin" is his band name, also very famous in Japan)
https://en.wikipedia.org/wiki/Begin_(band)
Original was released in 2002, so not new and pretty old song.
And in the shop, BGM including songs with vocal are actually covered
by non-professional singer case a lot, by copyright problem.
She is not born in Okinawa, voice method(charactors) and more are big different.
I thought whether it was this female "reggae" singer, but it seems to be different.
http://amzn.asia/ilmdjl9

Anyway, Okinawa music culture/history is very unique and quite different
against pure Japanese traditional even pop music, there are quite a lot of cheerful songs.
It is characterized by lyrics(as Japanese lang), costumes,
instruments(sanshin/三線), finger flute(yubi-bue/指笛) tecs and more.
https://youtu.be/c9LIeoy1KJI
Even if you can not play a finger flute, a convenient instrument now.
https://youtu.be/D7MW7zcsxgE
This video song is also one of Bigin's super big hit song, most Japanese knows.
https://en.wikipedia.org/wiki/Shimanchu_nu_Takara

Because Okinawa is a hot area in the southern country, it is close to Latin cultures.
They really like parties, dancing with drinking than Japanese who made a long history of Japan.
https://en.wikipedia.org/wiki/Ryukyu_Kingdom

Singers who are born in Okinawa or succeeded as traditional Okinawan music,
"Rimi Natsukawa", "Kazufumi Miyazawa(The boom : vo)" are very famous.
Unfortunately, hit songs based on Okinawa sound have not been born in the last several years.

This another song is also one cover of Bigin, first vocal are singing Okinawa style,
but second vid vocal is not, very beautiful clean/clear voice, though.
https://youtu.be/qOKA8TWl1TE
https://youtu.be/xCoi4dHLSWQ
(Did you noticed what is big different?)