COMING DECEMBER

KEROTOWN

Three fighters. Four maps. Five ways to play.

A free game from Kero Learns Japanese.

COMING TO
  • Google Play
  • App Store
WATCH THE TRAILER (opens in a new tab)Meet the fighters
The KEROTOWN town hall, a green roofed building with a clock tower, behind a fountain, cherry trees and a gold statue of Kero.

THREE PLAYABLE CHARACTERS

MEET THE FIGHTERS

The frog. The teacher. The dragon. All three can play!

KERO in the gold player colour

KERO

One very loud frog.

SENSEI in the gold player colour

SENSEI

The teacher takes a turn.

GORO in the gold player colour

GORO

Big horns. Bigger trouble.

Seven colours. Every fighter.Pick gold, red, blue, mint, plum, tango or aqua at the start. It stays yours.

Kero, Sensei and Goro from behind, each wearing a crown and a red cape with gold trim

LOOK WHO'S KING!

Take the lead. Get the crown AND the cape. Now every frog knows who to chase!

YOUR FIRST GAME

Learn it by playing.

Nobody gets thrown in. The first thing you play is a practice round you cannot lose.

The practice round on a phone held sideways. A list called TRY IT names eight moves and the button for each: walk with the move pad, look by dragging on the right, then sprint, jump, climb, bonk, dive and shout. Kero stands between red lanterns in the practice yard with his bamboo stick, and the thumb buttons sit round the edges.

  1. Try every move

    Walk, look, sprint, jump, climb, bonk, dive and shout. Each one ticks green when you do it.

  2. A quick check

    The game tries your phone for a moment and picks the graphics setting that suits it.

  3. Choose a name

    It goes on the scoreboard, so every name is checked before it is kept.

  4. Pick your fighter

    Kero, Sensei or Goro, in one of seven colours. You pick once. It stays yours.

PICK YOUR PLAYGROUND

FOUR MAPS. PLENTY OF TROUBLE.

Chase the crown through the streets, by the boats and over the castle roofs.

Bonk Street from above the snack stalls, with colourful shop fronts, rooftop bridges and the central plaza.

Bonk Street

Rooftop chases. Snack stalls. Bamboo bonks.

Mochi Harbor with its ferry, pink and mint loading decks and turquoise water.

Mochi Harbor

Bonk by the boats. Bounce back for more.

Kero Stadium with packed purple stands, a golden playing deck and a huge screen above the crowd.

Kero Stadium

A full crowd. A changing stage. Keep bonking!

The Castle beside its blue moat, with towers, broad steps and layered turquoise roofs.

The Castle

Up the steps. Over the roofs. Race to the top!

The red Oni, twice a frog's size, holding his spiked club

THE ONI

A big red demon is waiting on Bonk Street. Six bonks put him down. Land the last hit to win the prize!

Giant octopus balls land in the middle of the town

OCTOPUS BALLS

Five bonks in a row. Nine giant octopus balls fall from the sky!

FAN ART

Look for these on the walls.

Viewers of Kero Learns Japanese drew Kero and his friends. Now 34 of their drawings hang in the four maps, each with the artist’s name beside it. One more goes up soon.

Thank you to everyone who drew one!

Tap a drawing to see it big, and who drew it.

See where they hang

IN THE PLAYABLE GAME

FIVE WAYS TO PLAY

A crown to chase. A flag to grab. Balloons to save. Pick a mode and get bonking!

FREE FOR ALL

EVERY FROG FOR THEMSELVES

Bonk everybody! The leader wears the crown and cape.

TEAM BONK

VS

RED AGAINST BLUE

Two teams. Bonk the other team. Never bonk your own!

DOMINATION

HOLD ALL THREE FLAGS

Stand on a flag to take it. Hold all three!

DEFEND THE STAND

THIS STAND IS OURS!

Hold the festival stand. Lose it and the stand moves. Go get it back!

BALLOON BATTLE

THREE BALLOONS. MAKE THEM LAST.

Three balloons each. Lose them all and you are out!

POP A CAPSULE

Items and bonk streaks.

Gachapon capsules are dotted all around town. Walk into one. Pop! A random item is inside.

A gachapon capsule waiting on its round refill pad in the town
Spot a capsule
A capsule opens beside Kero during a round
Walk in. Pop it open!

The pads refill. Come back for another surprise!

Items to pick up

  • SPICY CHILLI

    8 SECONDS

    Catch fire! Run into other frogs to scorch them.

  • LONG BONK

    BIG STICK · 8 SECONDS

    Grab the Big Stick. Reach farther and bonk frogs from a distance.

  • GETA SPEED

    8 SECONDS

    Slip into Sensei's wooden sandals. Zoom around the town!

  • TAKOYAKI

    3 THROWS

    Three tasty throws. Lob a takoyaki to knock another frog flat.

Bonk streak rewards

Bonk 3, 5 or 8 frogs in a row. Your reward starts automatically! Getting bonked resets your streak.

  1. 3 BONKS IN A ROW

    BIG KERO

    Grow huge for eight seconds. Other frogs' sticks bounce off you!

  2. 5 BONKS IN A ROW

    OCTOPUS BALLS

    Nine giant takoyaki drop around you. Watch the frogs scatter!

  3. 8 BONKS IN A ROW

    SENSEI'S BONK

    A super long bamboo stick for a few seconds. Reach right across the street!

Kero holding a super long bamboo stick across the street during a round
Eight bonks. One VERY long stick.

BONK YOUR FRIENDS

Then go home.

Kero Town is where you go when the bonking stops. Walk anywhere you like. Collect stamps, find every shop’s word, and say hello to the townsfolk. They wave back.

Kero Town from above. The town hall and its clock tower stand behind a fountain and a gold statue of Kero, with shops, cherry trees and a big wheel all around.

けろたうんKERO TOWN

A town hall with a clock. A fountain. A gold frog in the middle of it all.

Kero, seen from behind with his bamboo stick, meets Sensei by the fountain in the plaza. Sensei has turned to face him. A frog in aqua stands behind a signpost, and sparrows sit on the paving.

まちのひとTHE TOWNSFOLK

They walk the streets. Walk up to one and they step aside, turn and wave. Shout, and they look round. The shopkeepers call out いらっしゃいませ, welcome!

  • The bakery, with a giant bread loaf on its roof, a red awning over the window and a bicycle parked outside.

    ぱんやBAKERY

    Bread in the window. A bigger one on the roof.

  • The konbini, a small shop with green doors and shelves of food filling both windows.

    こんびにKONBINI

    The corner shop. It sells a bit of everything.

  • The ramen shop, with red paper lanterns under its roof and bowls set out along the counter.

    らーめんRAMEN

    Red lanterns. Hot bowls on the counter.

  • Kero stands at the department store doors. Inside, a frog in a red cap waves beside the escalators, and big posters name the floors.

    でぱーとBIG SHOP

    Walk in the big doors. Ride the escalators up to TVs, toys and a food floor.

  • A menu board on the food floor of the big store, read up close. The plate says らーめん はっぴゃくえん, and under it RAMEN, 800 YEN. ぎょうざ is next on the list.

    おしながきTHE MENUS

    Read the menus on the food floor. らーめん is 800 yen.

  • The SHOP WORDS card, with 11 of 16 found. Each found word is a red tab with its English under it, like ぱんや BAKERY and はなや FLOWERS. The rest show only their hiragana, waiting to be found.

    おみせの ことばSHOP WORDS

    Walk past a shop and its word goes on your card. Can you find all sixteen?

  • A wooden noticeboard under a green roof with four posters pinned on it, and two small birds on the ground.

    けいじばんNOTICEBOARD

    Four posters. Two birds. See what is on.

  • Inside the gallery, four framed pictures on a cream wall, each with its name written underneath.

    ぎゃらりーGALLERY

    Look at the pictures. Take one home.

  • A house sign over a wooden door. A round red seal sits beside the words わがや and KERO, HOME 1.

    わがやMY HOUSE

    Every door gets its own seal.

  • Kero stands in his room in the tower, with a bed, a sofa, a desk, a clock and an easel. The sign on the back wall says FROG, ROOM 101.

    るーむYOUR ROOM

    Your own room in the tower, with your number on the door. Decorate it and paint the walls.

  • Kero holds his bamboo stick in a grassy yard with three round bonk dummies on posts. A red gate and the shrine steps are on the hill behind.

    けいこTRAINING YARD

    Practise your bonk on the dummies by the lake. They do not mind.

  • Kero stands on the wooden jetty over the pale blue lake. Two koi swim close by, two ducks paddle past and a dog lies on the jetty behind him.

    こいKOI

    Stand at the end of the jetty. The two koi swim over to you.

  • A small shrine on a green hill behind a tall red gate, with stone steps leading up to it.

    じんじゃSHRINE

    Up the steps, behind the red gate.

  • A street of wooden houses and lanterns, with a snow topped mountain standing behind them.

    ふじさんMOUNT FUJI

    The mountain is always there, over the roofs.

Kero, the golden frog, shouting with his arms wide open

MEET KERO

Small frog. Huge voice.

The town is named after him. So is the game.

けろけろ

kero kero

His name is a frog noise

An English frog says ribbit. A Japanese frog says kero kero. That is where he got his name.

Gold frogs are real

Kero is a Japanese tree frog. Almost all of them are green. Every so often one is born gold, and finding one is rare enough to make the news in Japan.

THE VOICE PAD

Tap one. Kero shouts it.

These are his real shouts from the videos. In the game you can press them any time you like.

Turn your sound on.

In the game they are buttons 1, 2, 3 and 4.

Kero Learns Japanese

One frog. A whole world.

Meet the faces behind the bonks. Follow their story and learn a little Japanese.

Sensei in his blue robe and white headband, raising one finger to teach

Sensei

せんせい

The patient teacher.

Turns Kero’s spectacular mistakes into Japanese lessons. Sensei means “teacher”.

Goro, the red dragon with cream horns, roaring

Goro

ごろ

The dragon at the door.

Breathes fire. Holds a grudge. There’s a story behind that scowl. Meet him in the anime and manga.

THE MUSIC

Hear the music.

The tracks from the trailer and from the game. Turn your sound on.

  • けろたうん

    KEROTOWN THEME

    40 seconds

    The trailer theme, straight into the action. Turn it up!

  • たうん

    TOWN LOOP

    15 seconds

    The loop that plays under a round. It goes round and round and never stops.

QUESTIONS

A few things to know.

Still in development. Here’s the plan.

When, and how much

  • When does it come out?

    It comes out in December 2026. The game is playable in development and is still being built.

  • How much does it cost?

    Nothing. It is free and it stays free. There is nothing to buy inside it and no coins to collect and pay for.

Getting in

  • Do I have to download anything?

    Yes. You will get it from Google Play or the App Store when it comes out in December. It is free.

  • What can I play it on?

    Phones and tablets. There is an Android app and an Apple app.

  • Is it in the stores yet?

    Not yet. It goes on Google Play and the App Store in December. The game is still in development.

  • Is it on Nintendo Switch or console?

    There are no console versions announced.

Playing with other people

  • Is it multiplayer?

    Online play for up to 30 frogs is planned. The game is still being built. The frogs in the current preview are computer players.

  • Will it remember my fighter?

    Yes. The first time you play, you pick Kero, Sensei or Goro and a colour. That fighter is yours, and the game keeps it on your device.

  • Who can I play as?

    Kero, Sensei and Goro. Each one comes in seven player colours.

  • Can I change my look?

    All three fighters come in gold, red, blue, mint, plum, tango and aqua. You pick your fighter and colour once, at the start. Take the lead in free for all to wear the crown and cape!

  • Can I play on my own?

    The current game has computer frogs to play against. You can see them in the preview while online play is being built.

In the game

  • How do I learn to play?

    Your first game is a practice round you cannot lose. Walk, look, sprint, jump, climb, bonk, dive and shout, and each one ticks green as you find it.

  • Where can I play?

    Four maps: Bonk Street, Mochi Harbor, Kero Stadium and The Castle. The Oni appears on Bonk Street.

  • What is Kero Town?

    It is the town you walk around between games. There are shops, a big store, a lake and your own room in the tower. The townsfolk wave back.

  • What are the octopus balls?

    Bonk five frogs in a row and nine giant たこやき automatically fall around you. Watch the frogs scatter!

  • What is the voice pad?

    Kero's real shouts from the videos. In the game they are buttons 1, 2, 3 and 4, and you can press them whenever you like.

Who made it

  • Who made it?

    Kero Learns Japanese.

  • What is it built with?

    It is built with Godot.

  • Is there a soundtrack?

    Yes. You can hear both tracks on this page, just above these questions.

  • Will there be other languages?

    A language menu is planned.

The manga · Episode 01

A dragon attacks Kero’s village!

Kero shouts as Goro breathes fire across their burning village.

Read Kero’s story. Learn Japanese along the way.

Read the manga

Be there when it drops.

Catch Kero’s latest adventures while the game takes shape.

WATCH ON YOUTUBE (opens in a new tab)Kero Learns Japanese