Kaijuu Sekai Seifuku

20253m

Following the chaotic and heartwarming daily lives of Kaijuu who have come to Earth to conquer the world and live with their human masters.

Production

Logo for DLE

Seasons

38 Episodes • Premiered 2025

Still image for Kaijuu Sekai Seifuku season 1 episode 1: I Want You to Clean Up

1. I Want You to Clean Up

I'm a 28-year-old office worker who lives with monsters in Tachikawa. The monsters' names are Mera, Gooska, Aniki, and Sugar. Living together is just fun... but it seems that's not all that great.

Still image for Kaijuu Sekai Seifuku season 1 episode 2: I Want to Go on a Diet

2. I Want to Go on a Diet

I started exercising to try and get rid of my weight. The monsters help me out, but it seems like more of a nuisance than a blessing. And then, Sugar finally gets a great skill... but how?!

Still image for Kaijuu Sekai Seifuku season 1 episode 3: I Want to Go Outside and Play

3. I Want to Go Outside and Play

On a nice day, you took the monsters to the park. The monsters were nervous about swinging on the swings for the first time. But you taught them how to ride them... and they had a lot of fun!

Still image for Kaijuu Sekai Seifuku season 1 episode 4: Ah, I'm grateful

4. Ah, I'm grateful

Still image for Kaijuu Sekai Seifuku season 1 episode 5: It's Children's Day

5. It's Children's Day

It's Children's Day. The boss made the monsters helmets and swords out of newspapers. The monsters are engrossed in play sword fighting. There is one more thing in the sky that makes the monsters happy...

Still image for Kaijuu Sekai Seifuku season 1 episode 6: It's Moving Soba

6. It's Moving Soba

One day, a box of moving soba noodles was left in front of my house. It seems that someone has moved in next door. But they look like some pretty surprising people!

Still image for Kaijuu Sekai Seifuku season 1 episode 7: They are New Monsters

7. They are New Monsters

It seems that two monster brothers, GaoGao and Garuga, have moved in next door. Will they be able to get along with the others?

Still image for Kaijuu Sekai Seifuku season 1 episode 8: The House Next Door is Leaking

8. The House Next Door is Leaking

The Gaogaru brothers live with a businessman a little younger than them. They just moved in, and now their house is leaking... They call for help, a skilled repairman!

Still image for Kaijuu Sekai Seifuku season 1 episode 9: It's a Cat

9. It's a Cat

The cat Shisho, the siblings' idol, seems to have learned a lot of things. But he still hasn't mastered bath time. The only way to surpass Shisho is to master bath time.

Still image for Kaijuu Sekai Seifuku season 1 episode 10: It's the Monsters' Secret

10. It's the Monsters' Secret

Mera, Gooska, Aniki and Sugar are not just cute monsters. They each have their own incredible secrets!

Still image for Kaijuu Sekai Seifuku season 1 episode 11: My First Time Meeting My Neighbor

11. My First Time Meeting My Neighbor

This was your first face-to-face encounter with your neighbor! Since you both live with monsters, you two seemed to hit it off right away. With monsters so close by, could there be more out there...?!

Still image for Kaijuu Sekai Seifuku season 1 episode 12: My First Bookstore

12. My First Bookstore

At the bookstore that you took us to, the monsters seemed to be fascinated by the dinosaur picture book. But then they wondered, "What are dinosaurs?" You had trouble explaining it...

Still image for Kaijuu Sekai Seifuku season 1 episode 13: I Go Out on Rainy Days

13. I Go Out on Rainy Days

Mera and her friends go out wearing raincoats on a rainy day. They bump into the Gaogaru brothers and end up going to a candy store. Something unbelievable happens there!

Still image for Kaijuu Sekai Seifuku season 1 episode 14: I Want to See a Shooting Star

14. I Want to See a Shooting Star

It seems that if you make a wish on a shooting star, it will come true. The monsters and I tried our best not to fall asleep while waiting for the shooting star... but did everyone's wishes come true?

Still image for Kaijuu Sekai Seifuku season 1 episode 15: A Spicy Cheer Me Up

15. A Spicy Cheer Me Up

It seems like the guy next door has had a bad day at work. When Master and Mera found out about this, they wanted to somehow encourage him, and Mera came up with a great idea... but is that really true!?

Still image for Kaijuu Sekai Seifuku season 1 episode 16: Instant Noodle Eel Day

16. Instant Noodle Eel Day

Still image for Kaijuu Sekai Seifuku season 1 episode 17: The Friends I Met over the Summer

17. The Friends I Met over the Summer

Mera and her friends go to the park wearing the straw hats that their master bought them. There is a unicorn playground equipment there, and Mera puts her straw hat on the unicorn. That night, something surprising happens!

Still image for Kaijuu Sekai Seifuku season 1 episode 18: I Tried the Summer Festival

18. I Tried the Summer Festival

Mera and her friends invite the Gaogaru brothers over to their master's house to play a summer festival. Gaogaru has a blast and leaves, but what's the master's reaction next door?

Still image for Kaijuu Sekai Seifuku season 1 episode 19: It's Important to Get Up Early

19. It's Important to Get Up Early

Gusuka really wanted to see the morning glory flowers that bloom early in the morning. Sleepyhead Gusuka tried his best to get up early, but was he able to see the morning glories?

Still image for Kaijuu Sekai Seifuku season 1 episode 20: It's a Delicious Green Feast

20. It's a Delicious Green Feast

My relatives sent me a lot of edamame beans, so I thought I'd share them with my neighbors, but instead they sent me a lot of bitter melon... We'll just have to have a party!

Still image for Kaijuu Sekai Seifuku season 1 episode 21: It's So Hot, I Can't Stand It

21. It's So Hot, I Can't Stand It

Be careful even inside the house on hot days! I prepared a secret weapon for the monsters staying at home alone... I never thought it would turn out like this!!

Still image for Kaijuu Sekai Seifuku season 1 episode 22: Shaved Ice is the Best!

22. Shaved Ice is the Best!

Shaved ice is the best thing on a hot day! I made shaved ice for the monsters, but... My brother, who loves cold food, helped me out!

Still image for Kaijuu Sekai Seifuku season 1 episode 23: Typhoons are Dangerous!!

23. Typhoons are Dangerous!!

A typhoon is approaching Tachikawa, where the brothers live! The brothers and the monsters are fully prepared. However, the neighbor says he wants to go to work... Will the brothers be able to stop him with their trump card?

Still image for Kaijuu Sekai Seifuku season 1 episode 24: Dango is Better Than the Moon?

24. Dango is Better Than the Moon?

On the fifteenth night of the lunar month, the lord and his brothers, along with their neighbor's brother, each went to watch the moon. The full moon is beautiful, but what are the monsters looking for...?

Still image for Kaijuu Sekai Seifuku season 1 episode 25: Turn into a Monster Eggplant!?

25. Turn into a Monster Eggplant!?

A relative sent a lot of eggplants, so she cooked every eggplant dish she could think of and served them to the monsters. But the next morning, the monsters got into some trouble!

Still image for Kaijuu Sekai Seifuku season 1 episode 26: We're the Three Snack-Buyers

26. We're the Three Snack-Buyers

GaoGao and GaruGaru invite the foodie Sugar to buy some snacks. Then, just as they try to strengthen their bond as friends, something terrible happens!

Still image for Kaijuu Sekai Seifuku season 1 episode 27: Autumn Art

27. Autumn Art

Mera, Gooska, Aniki, and Sugar each completed a piece of work using the master as a model. What kind of creations did they create...?

Still image for Kaijuu Sekai Seifuku season 1 episode 28: Autumn, the Season for Cleaning

28. Autumn, the Season for Cleaning

Autumn is the season for reading, appetite, and sports... they all sound fun. What kind of autumn will it be for GaoGao and GaruGaru?

Still image for Kaijuu Sekai Seifuku season 1 episode 29: I'm Picking Chestnuts

29. I'm Picking Chestnuts

Mera and her friends are excited about their first chestnut picking adventure. However, the number of chestnuts they picked doesn't match the number they brought home. What could have happened?

Still image for Kaijuu Sekai Seifuku season 1 episode 30: Happy Halloween

30. Happy Halloween

Mera, Gusuka, Aniki and Sugar dress up in strange costumes and go to their neighbor's house. Will GaoGao and GaruGaru give them sweets?

Still image for Kaijuu Sekai Seifuku season 1 episode 31: The President is Surprised

31. The President is Surprised

Apparently, the man next door made a mistake at work, and is drinking with GaoGao and GaruGaru at a food stall. Then, to his surprise, the company president shows up...and a shocking secret is revealed!

Still image for Kaijuu Sekai Seifuku season 1 episode 32: Mochasuke is Amazing

32. Mochasuke is Amazing

The president knows a lot of good things about Mochasuke. Will he be able to get along with Mera, Gusuka, Aniki, Sugar, Gaogao and Garugaru?

Still image for Kaijuu Sekai Seifuku season 1 episode 33: Episode 33

33. Episode 33

Still image for Kaijuu Sekai Seifuku season 1 episode 34: Episode 34

34. Episode 34

Still image for Kaijuu Sekai Seifuku season 1 episode 35: Episode 35

35. Episode 35

Still image for Kaijuu Sekai Seifuku season 1 episode 36: Episode 36

36. Episode 36

Still image for Kaijuu Sekai Seifuku season 1 episode 37: Episode 37

37. Episode 37

Still image for Kaijuu Sekai Seifuku season 1 episode 38: Episode 38

38. Episode 38

Cast

Photo of Aoi Yuuki

Aoi Yuuki

Mera / Gusuka / Aniki / Sugar / Narrator (voice)

Photo of Rina Kawaei

Rina Kawaei

Owner (voice)

Photo of Sota Nakajima

Sota Nakajima

Neighbor's Owner (voice)

Photo of Misato Fukuen

Misato Fukuen

Gaogao (voice)

Photo of Megumi Satou

Megumi Satou

Garugaru (voice)

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