What is the akai rice commercial song?

The akai rice commercial song that you may be talking about is: _Akai na taiyou no shita de/Akai hana ga saiteiru_ [Under the red sun/Red flowers are blooming]."

This is the CM song for "Akai", the leading brand of rice in Japan. It's a famous song loved by Japanese people of all ages and sung by anison singer Yoko Minamino..The commercial song can be listened to on YouTube (https://www.youtube.com/watch?v=j0_0w0o769c).