Grand Blue Dreaming Season 3 Reveals Key Visual and New Opening Song “Natsuko” by FUNKY MONKEY BΛBY'S

We were just getting comfortable with the usual chaos, and then Grand Blue Dreaming decided to celebrate “Scuba Diving Day” in Japan with a proper splash: a new key visual and a fresh opening theme announcement for Season 3. Yes, we’re packing the fins again.

“Scuba Diving Day” and the reveal that came with it

In Japan, 5/24 gets a punny reading: 5 as “Go,” 2 as “to,” and 4 as “Shi/Sea.” Put it together and it’s basically “Go to Sea.” We love a calendar that shows up with a dad-joke energy and an anime announcement in the same breath.

To mark the occasion, the anime’s official site presented the new key visual and confirmed the Season 3 opening theme:

• Opening song:“Natsuko”
• Artist:FUNKY MONKEY BΛBY'S

And yes, the band had already teased the tie-in earlier during the final stop of its 20th anniversary tour. Timing matters. Comedy loves timing. So do divers.

Release window and where we’ll watch

Season 3 is set to premiere in July, airing on the following Japanese channels:

• Tokyo MX
• BS11
• MBS
• AT-X

We don’t need to overthink it. We just need that first episode to hit, and the opening to land like a perfectly timed belly flop.

New cast, new location, same brand of trouble

This time, the story heads to Palau, which is notable for one simple reason: it’s the first time the season’s setting goes outside Japan. In practice, that means new scenery for the same old decisions.

Season 3 also brings in newly announced cast members:

• Sayaka Ōhara as Sayaka Kotegawa
• Asami Seto as Chief
• Aya Suzaki as Maki

A quick recap of where we’re coming from

The second season wrapped with its 12th episode in September. Earlier, the full season had leaked online in July, and the last episode in that leak even listed a third season. Not the cleanest way to learn news, but the ocean is rarely tidy.

The manga and the wider Grand Blue Dreaming universe

The manga by Kenji Inoue and Kimitake Yoshioka began serialization in Good! Afternoon in April 2014. Kodansha USA Publishing releases it digitally in English, pitching a seaside college “debut” that quickly turns into diving, beautiful girls, and alcohol-fueled antics with a crew of lovable disasters. If we need an example: imagine planning a calm scuba lesson and ending up in a club meeting that somehow becomes a full-body workout and a life choice audit.

The TV anime first premiered in July 2018, and it also inspired a live-action film that opened in Japan in August 2020.

Now we want to hear you. Are we most excited for Palau, the new cast, or hearing FUNKY MONKEY BΛBY'S kick things off with “Natsuko”? Tell us what you’re betting on for Season 3—and what kind of shenanigans you expect to see underwater.