Japan Airlines(JAL) Announces "1Free excess baggage for Diving Gear for 2023"

https://www.jal.co.jp/flights/en-sg/flights-from-singapore-to-tokyo (JAL Singapore web page as sample)

Fly JAL to maximize your sports vacation in Japan

Japan Airlines is assisting Skiers, Golfers, Divers and Cyclists traveling to Japan.
An Extra Checked Baggage allowance for Sports Equipment (eg: skis, clubs, diving gear and bicycles)
Fly Japan Airlines to enjoy Skiing, Golf, Diving and Cycling in Japan. For a limited time, we are offering an extra checked baggage allowance for overseas travelers bound for Japan with their sports equipment.

HOW TO APPLY
To apply, please contact our contact center no later than one day prior to your flight’s departure date.
In case of a reservation change, please contact our contact center at your location.

DIVING AND UNDERWATER PHOTOGRAPHY EQUIPMENT
1PC of excess baggage and the excess size charge (Fee for Exceeding Free Baggage Size) shall be exempted.
When the weight of checked baggage exceeds the free allowance, the extra charge is applied.