Secret Underground Base is the 361st chapter of the Doraemon manga series. It was adapted into episodes of the same name in both the 1979 anime series and 2005 anime series.
Nobita discovers a cave at the mountain and decides to turn it into his secret base, but it is soon taken over by Gian and Suneo once they're aware of his plan. Seeing Nobita's misery, Doraemon brings out "Secret Underground Base Maker", giving Nobita full control over its design. After the successful construction, the two take a tour around the base, eventually ending up at the Command Room which is equiped with Spy-Eye and monitor.
Using the Spy-Eye, Nobita and Doraemon locate the cave that now belongs to Gian and Suneo. Seeing that the two party party and mock over him, Nobita launches a Mud Missile at Doraemon recommendation, throwing a warning at Gian and Suneo before the missile arrives and explodes in their face, driving them away. Feeling that he needs to give them a bit more payback, Nobita and Doraemon use the secret passage with "Secret Passage Light" to get into the town, mock Gian and Suneo, and quickly escape back to the base, with the passage closing up behind and leaving Gian and Suneo to the mercy of a civilian whose house's wall they try to crash in order to follow them.
Believing it's his duty to watch over the town people's safety, Nobita decides to start his mission by sending the Spy-Eye to Shizuka's house, only to discover that she isn't at home (and takes bath as usual). After spying around the town shortly after, they discover that Shizuka is being harassed by a highschooler who wants her to go on a date with him and quickly send Sneezing Missile to drive him away.
As the two of them celebrate their victory, Nobita hears Tamako's scolding from above ground and sends the Spy-Eye back to the house, discovering that Tamako has in-fact found another of Nobita's 0 score test paper. Angry that Tamako always rammages through his belonging, Nobita sends out a warning to Tamako begin before he launches Tickling Missile against her, forcing her to leave the test paper and flee from the room. Nobita then heads to overground through the secret passage, intending to destroy the evidence before she comes back. Unfortunately for Nobita, Tamako has discovered the secret passage, sneaks into the base, and easily hijacks it from Doraemon.
Now fully in control of the base and its weaponry, Tamako monitors Nobita's action through the control room and orders Nobita to finish all his homeworks while threatens to launch missile at him the moment he leaves his table, with Doraemon leaving Nobita up to his own fate.
Later Candy • Human Cutter • Apartment Tree • Yoro Otsumami • Invisible Eye Drops • Anytime Diary • The 100 Years Later Appendix • Selling the Night • XYZ Light Camera • Fake Alien • Weather Box • Invisible Shower • Thousand Needles Trout • Playing With Dolls • Make a Little Brother! • Running Away Like Animals • Inside the Stomach • Wishing Star • Human Radio Control • Speed Clock • Nobita's Dinosaur
The "What if" Phone Booth • Robot Paper • Politely Kick Out the Unwanted Guest • Walking on Clouds • Werewolf Cream • Crank Up the Speed! • The Legendary Sword: Lightning Bolt • Disaster Training Machine • The Sharing Gum • The Hypnosis Glasses • The Making of a Television Channel • Plan Y • Antenna of Prediction • The bag of Taking Things • Swapping Body Parts • Vending Time Machine • Discovery of Antics • Gian's Close Friends • Doraemon's Secret (Doraemon Encyclopedia)
The Seeking Missile • Fortune Telling Through Tongue Reading • The Plaster of Truth • Reminder Bird • Premonition Bug • Aerial Warfare • Owner Resemblance Dumpling • The Hero of Justice:The Masked Warrior • Let's Used to the Lightning • Weather Chart • Dried Ghost • Donbura Powder • A Giant Appeared • Umbrella of Love • Indoor Fishing Pond • The Strongest Marksman • All-in-one Rein • Voice Thickener • Delay Camera • Buying a Castle at Germany
Exaggerating Sweater • Retrieval Telescope • Parasite Nickel • World That Not Need Money • Electrical Kit • Gian Stew • Taking an arrow to school • Fusion Glue • Millionaire Straw • Treasure Set • The Magic Hand • Spaceship Controller • Wrestling Killer • Reverse Light • Something is Gonna Occur by 7 o' Clock • Get That Base • Passport of Satan • Soul Time Machine • The Chaos of the Wind • Cubic Copy • Hi, the Alien
Home is further and further away • About Molting • Advertising with the Mirror • Mood Ban's Performance • Calling Collar • Telepathy Microphone • Secret Passage Pen • Boastful Ancestor • Typhoon Generator • Escape from Home for Uninhabited Island • Minicar Driving School • The Lazy Day • Riding a Ball • Nice Mii-chan • Into the wrong way! • Cannibal House • Alien House? • Swimming pool in clouds • The war of radio-controlled boats • Grandpa in the dream
Dream Channels • Cat Runs a Company • Treasure of Chinkara Peak • Door Out Of Nothing • Switching Rope • Chain Letter Syndicate • Almighty Pass • Catching the villain with Time Machine • Peeking Camera • Railroad Crossing Kit • Redo Life Machine • Rank Badges • Dictator Switch • Copy Gun • The Expression Controller • Collecting sound pollution in a can • Portable Parliament • World of Cat's Cradle
Special screening at Nobita's room • Thrilling Boomerang • Bias Badge • Spying with Spy Satellite • Swimming pool in the room • The small house in an iceberg • Nobita running to Kyushu!! • Fruit of telepathy • Driving the vacuum cleaner • Automatic pawn shop • Maze House • Real Cap • Planet of happiness • That day • Komon Candy • Girlfriend Catalogue • Future Checkbook • Sandman in a sleepless night • Hundred Painful Timers • The Dandelion goes to the sky
Athletic House • Human Blocker • How to walk at the seabed without going into the sea • Attic Star Wars • The Happy Mermaid • Riot of the Robot Seeds • Couple Test Badges • Nobita's secret tunnels • Preference Box • The Odd, Odd Umbrellas • Pandora • Machine that making appreciation • Ordering Phone • Shadow Collecting and Screening Machine • Around the World Quiz • The Invincible Insect Pills • Santa Claus Chimney • Skiing in the park • Leave asking via the glass
Skiing Without Snow • Radish Promenade • Japan is So Large • Hight Responsibility Amulet • Dinosaurs Appear • Alone in the Future World • Arrogant Nobita • Pleasure in a Small House • Go! Go! Nobitaman • Dracula Set • Happy Walking • Memory Camera Man • Finding Mother for Three Thousand Kilometres • Emulating Tool • Santa Mail • Spirit Calling Bracelet
The Mecha Maker • Winning Camera • Operation: Sleeping Dekisugi • Education Candy • Getting Hurt Without an Accident • Jaiko's Fan is Nobita • Full Speed Ahead With the Radio Controlled Simulator • Devil Card • Blue Bird of Happiness • The Suicude Squad for Saving Nobita • The Time Machine is lost! • Stale Picture Mirror • Supposing Medicine • Tax Bird • A Comfortable Hot Bath with the Hot Bath Rope • Stray Dog Ichi's Country
The Real Video • Letter Writing Pen • The Dreadful Ropes of Justice • Department Store at Home • Happy Birthday to Gian • Ma Ma Bo • Aquarium in the room • Cheerleader Gloves for Victory • Water Powder • Clairvoyance Sticker • Worse Than Me • Doctrine Association Badges • Luckily I Still Wake Up • My Guardian Paper • A long new year • Titanic Robot
Nobita's Helicopter • Yumeko Nichitani-san • Conflagration Bell • 20th century lord • Territory Drop • Farm of Snack • Time, keep going!! • Delivery Machine • Sinking Seed • Folded Paper House • Jaiko, Manga Writer • Outstanding Light • Animation is a piece of cake • Six-sided Camera • How to enjoy with Gian's voice • Nobita, the sharpshooter • Lonely Doraemon
Nobita's Long Time Running Away From Home • Being rich with the pencil • Spare Pocket in the 4D pocket • Nobita's Space Shuttle • Delightful Belly Gas • Nobita gets hunderd points!! • Material Changing Light • Writing Manga in the can • Joining Incense • Peaceful Antenna • Following Winged Ants • Blue train is my home • Eight Days at the Underwater Castle • Tomorrow's Newspaper • Nobita's the Night Before a Wedding
TV Torimochi • Earthquake Catfish • Truth Flag • Riding Unicon • Donbura Gas • Sailing the submarine to catch the abalone • Equalable Bomb • Magical Girl Shizu-chan • Weight Changing Flashlight • Adventure with Parachute • Air Broadcast Sattellite • Lively Forest • Water Video • Keep walking to the moon • Nobita's Black Hole • Variety types of snow modifiers • Nobita's Underground Country • Time Capsule
Fourth Dimensional House Block • Nobita's Training • Doraemon in love • Cuckoo Egg • Body Dividing Mallet • Let's ride the insect plane • The thin and long friend • Decision Timescope • Polarmap and Camera • Human Cover • Career Armband • Real Game Player • Nobita has only one • □ ○ Phobia • Have a good Dream, Gian and Suneo • A world without mirror • 10-minute late esper • The Fearsome Happiness Cards
Transforming Capsule • Horizon Tape • Brother Sticker • Switching House Tag • Each punch worths hundred yen • Famous with the New Species Scrapbook • Shizuka's Secret • Ninja Training Set • Dream Stairs • Why is the play chaos? • Suneo's Test Paper, Danger! • Artist Tag • Nobita Airline • The God Robot • Symbol Order Machine • Model of 100 Jyo Island • Pearl Producing Chest
Peeking Plank • Mehanic Converting Machine • Instant Robot • Explore Outer Space Game • Life as a Ghost is too hard to Resist • Escaping Robot Model • Saturnined Gian • Automatic Returning Machine • Freeze-Framing Him • Swimming in the Large Universe • The Rabbit Monster on the Mountain behind the School • Remember the Great Feeling of That Day • Flying Fabric • Flattening Iron • Martin Nobita • Tsubasa-chan Coming at Home • Jaiko, Manga Writer
Mini Real Encyclopedia • Blackening Superstars • Shark in the Lot • Multiplying Bank • Nobita, The Genius of Sleeping • Midnight Annoying Phone • Pet House • Nobi-chan-man in Chroma Key • Gian on the TV • Drunken Lid • Trunk of Nostalgia • Room Switching Switch • The Act Predictor Lens • Small Hang Glider • People in the Past is Lucky • Inventing with the Inventing Machine
A Long Day with Time Floodgate • Getting the Sea Monster • Variety of Ghosts • The Esper Suneo • Moses Stick • Dinosaurs, Please come to Japan • House of Happiness • Fun with Experience Recorder • Dwelling Permitting Tree • Afterward Album • Tarzan Pants • Friendship Rope • Protection Radius • Wall View Changer • The Next Part of Comic • Modifying Joko Q • Leave Testing
Into the 3D Giant Screen • Nobita can be also a genius? • Fishing Pond for Things You Dropped • Rebuild the old Hotel • The Realest 3D Picture • Video Remote • Feather Plane • Nobi's has no gravity • Everything Airport • Time Zone Clock • Suneo's Bottom is lost • Cinderella Nobita • Billionaire Nobita • Wanted Person Finder • Mincing Robot • Let's Read Lusciously • Continuous Imagination Magnifying Glass • Good Bye Shizuka
Nobita becomes a poster • Gian Fan Club Fever!! • The Underground Dry Light • Anytime Anywhere Rollerskate • This Road, That Road, and The Easy Road • Adult Scolding Armband • The Mirror World • Future Camera • Punishing Gian the Poacher • Halley's • Santain Medicine • Intention Gun • Blowing the Fuse Whenever You Dislike • Steam Locomotive Chimney • If I had sent the postcard, I would have won a reward • The Mask School • Goodbye Kibo
Flying Through the Sky on the Letter "ワ" • Eskimo Water • Crowded Antenna • Superhero Set • Being the artist with Vision Beret • Magic Without Secret • One-day Persimmon Fruiting • Flowing Time • Bringing Raing Man Making Trouble • Automatic Delivery Label • Spirit Blowing Gun • Commanding Credit Card • Transform, Transform, and Transform| • Sometimes Nobita can repent • Earthquake Training Paper • Daydreaming on the Clouds • Pirarucu in the Puddle
Sending the Secret with the cannon • Microphone Typewriter • Sound Reflecting Mountain Making Trouble at Late Night • Slacker's New Year Set • Slope Gear • Model Chicken and Egg • Reversing Mistakes • Muriyari Cash Card • The Sweet House with Shizuka • Machine for Getting Off the Earth • Hot Letter to Gian • Obligation Potion • Give Doraemon a Break • Clay Robot • Everything is Doll • Winding System Subterranean Ship • Pretending Devil Water • Typhoon Gian is Approaching • Hoi of Donjara Village
Booking Chip • Good Dream with Opposite Dream Pill • Gulliver, the Troublemaker • Represent Can • Dramatic Gas • Delusion Fork • Reformed Gian • Calm Down Bee • Time Watching Hole • Doomsday Prediction • Adventurer Tea • Play as an Angel • Prank Toy Machine • Alarm Ghost • Nobita's Son Running Away From Home • X-Ray Monitor • Sake Swimming in the River • Lumberjack Swamp • Kasa jizo
Magic Dictionary • Everything Company • Sense Monitor • Spirit Potection Robot • Plate Lift • Confindence Ruining Machine • Present Cloth • Ski Lift Stick • Shocking Video Camera • Lie Speaker • Story of the Cute Pebbles • Kaguya-hime Robot • Come Come Cat Food • Interruption Phone • Shizuka in an Egg • Nobita's Escaping Zero Strategy • Cloning Solution • Ghost is Appeared! • Super Hit Chistina!
Shiny Night Sky • Sigh! Gian's Concert Again • Clock Hatched from an Egg • Dream Player • Sleeping Annoying People • Converting Gun • Revenge Bill • Friend Circle • Conformed Lying Story • Danger Prevention Sticker • Sleeping Doing Case • Adventure Game Book • Way of Using the Banana Leaf • Convenient Rod • Collecting Matsutake in the Box Garden • Lonely Drink • Stone Age Hotel • Freezing Light • Suneo's Incredible Fort
Wonderland Tickets • Nobita becomes a god • Memory Disk • Handicap • Ten Commandments Stone • Thickness Removal Pin • Transportation Shoes • Just Honne • Handmade Clouds are so fun • Secret Passage Pen • Mentalist Hat • Balloon Letter • Moving Stick • 4D Rookie Driver Sticker • There is a Spirit in the Cushion!! • Gian Murder Case • Nobita's Model Railway • Robinson Crusoe Set • Clockwork Typhoon • Factual Convertion Machine • Rainbow Violeta
Country Maker • Teacher is coming again • Swapping Glove • Haunted Tincture • Fairytale Eggs • Looks, Strength, or IQ? • Willing not to be back to the normal boy • Correspondent Robot • Free Size Doll Camera • Typhoon Trap and Wind Storage • Diligent with Nature Screen • Blind Spot Star • Time Room and the Persimmon Tree in the past • Suneo is the Ideal Big Brother • Mini Hot Air Balloon • Human Piggy Bank Maker • Flying Comic Books • Jaiko, Please Don't Cry • Get Shizuka Back
Left Straight Right Right Left • Invisible Body Guard • Hamelin's Trumpet • Future Book Coupon • Inherit Gas • Mini-Doraemon • Eyes and Mouth Patroller • Switching Blanket • Nobi's has 30 floors • Timed Stupidity Bomb • Let's collect insects in the world • Retriving Spray • A Giant Monster in the Uninhabited Island • Horrible Dinner Show • Variable Calendar • Anytime Anywhere Sketcher • Weight Meter • Underwater Late Night City
Don't want Nobita as a cat? • High Power Printer • Delay Chestnut • Booking Phone • Comfort with the Brain Copy • Man must be uncompromising • Let's gather weather • The easy way of master • Time Copy • Human Remote • Synthetic from Minerals • Intending Stone • Excellent Look Spray • Accurate Seer • Mini Aliens Attacking Nobita • Picnic and Watching the Bloom Flowers • Nobita Will Disappear? • Jack, Betty, and Jenny
Switching Gun • Broadcasting Picture Book • Furious Time • Ten-yen Store • Gian in love • People's fate cannot be known • Deliveryman Cap • Anime Box • Upgrade me • Nobita's Good Scene • The War of the Hanmade Missiles • Do you know about hunger sufferance? • Found the Dinosaur's Footprint • Insect Attraction Board • Balance Cushion • Season Cans • New Jaiko's Manga • Hawaii is Coming • Cutting the part of the Sea • The Treasure Planet • White Hole Pen and Black Hole Pen
Life Ring Pipe • Doraemon is Badly Ill • Super Power Lung Pump Gas • Southern Sea Adventure • Nature Observing Toy Set • 4D Trashcan • Battle of Bottle Ship • Time Skipping Pulley • Human Sugoroku • Represent Paper Doll • No matter it happens I am watching the bloom flowers • Horrible Contagious Diseases • Map Syringe • Body Dissolver • The Man who comes from Garapa Planet
