• Note 1 - https://www.generasia.com/wiki/Hexagon_Family

Toshifumi Fujimoto and his duo partner, Takayuki Haranishi, were regulars on the show "Quiz! Hexagon II". The regulars were called the "Hexagon Family"

• Note 2 - Yukina Kinoshita (Fujimoto's ex-wife) was in a group called Pabo. They were also regulars on the show "Quiz! Hexagon II" and thus also considered to be part of the "Hexagon Family".

Fujimoto and Yukina divorced in 2019. Here's her wiki if you wanted to read a bit about why they got divorced: 

https://en.wikipedia.org/wiki/Yukina_Kinoshita

• Note 3 - Chance is making the sound of a Shakuhachi, which is a type of Bamboo Flute.

https://www.youtube.com/watch?v=GuhNBDjofIM (Video of the Shakuhachi being played)

https://en.wikipedia.org/wiki/Shakuhachi

• Note 4 - Cessna is an aircraft manufacturer.

https://en.wikipedia.org/wiki/Cessna

• Note 5 - Tokyu Hands is a Japanese departmental store that specializes in crafts and materials. The store is  a "Creative Life Store" and is quite popular for DIY'ers.

https://www.tokyu-hands.co.jp/en/

• Note 6 - Wangan Studio is a studio owned by Fuji TV. The term "wangan" means gulf or bayshore.