Sengoku Minecraft is an immensely detailed data pack/resource pack that overhauls vanilla Minecraft into the world of Japanese history, culture, and mythology. Re-themeing elements such as biomes, mobs, items, weapons, blocks, structures, recipes, sounds, music, and much more. 

I HEED YOUR CALLS, I HAVE DITCHED OPTIFINE! UNFORTUNATELY, THAT MEANS I MUST RECOMMEND EVERYONE TO INSTALL THE MODS BELOW:

• [EMF] Entity Model Features
• [ETF] Entity Texture Features
• CIT Resewn
• Continuity
• Lithostitched
• Polytone

If you want the cool skybox

• Nuit (formerly FabricSkyboxes)
• FabricSkyBoxes Interop

These mods require these libraries

• Fabric API
• Fabric Language Kotlin
• Forge Config API Port

I'm sure a lot of you guys have some of these anyway, so hopefully it won't be that hard :)

Recommended but optional compatible mods

• Ambient Sounds
• Better Combat
• Blood n Particles

Or just download this modrinth modpack. 

BIOMES

Overworld

OVERWORLD

The Minecraft Overworld is meant to represent the real world and its environment types. Enviroments Japan doesn't have lol. And since the whole point of this project is to both expand and reduce Minecraft into Japan, that means no deserts, savannas, red-rock canyons, icebergs, or rich jungles (They have sub-tropical forests at best).

Japan's natural landscape is mostly dominated by temperate forests and mountainous regions. This will make the diversity of biomes and climates smaller but better fit the narrative for this project; which is to trick you into thinking youre in Japan. And I can't pull that off when you spawn right between Canyonlands National Park Utah, The Amazon Rainforest, and the Arabian Desert.

However I'm not just deleting biomes and calling it a day (Except for the Frozen Ocean, the icebergs are hardcoded in). I have overhauled these biomes into something completley new, for example the Badlands has been reworked into the Sanguine Forest. The orange red-rock and sand has been substituted to regular stone and grass, but have transformed into a autumnal temperate forest with rich warm colors. I've also divided the biomes by seasonal characteristics, allowing the transition between biomes to feel more natural and less jarring.

Verdant Seasonal Biomes Plains

Forest

Sakura Grove (Cherry Grove)

Shibazakura Plains (Sunflower Plains)

Meadows

Pampas Fields (Windswept Savanna)

Subtropical Forest (Jungle)

Dark Forest

Flower Forest

Birch Forest

Bamboo Forest (Bamboo Jungle)

Swamp

Autumnal Seasonal Biomes   Sanguine Forest (Badlands)

Harvest Fields (Savanna)

Marshlands (Mangrove Swamp)

Bloodgood Forest (Wooded Badlands)

Taiga

Golden Forest (Old Growth Birch Forest)

Maple Oak Forest (Savanna Plateau)

Silver Grass Fields (Sparse Jungle)

Hot Springs (Eroded Badlands)

Old Growth Pine Taiga

Old Growth Spruce Taiga

Wintry Season Biomes Snowy Plains

Snowy Taiga

Windswept Hills

Windswept Forest

Snowy Bamboo Forest (Ice Spikes)

Grove

Snowy Forest (Frozen Ocean)

Snowy Dark Forest (Deep Frozen Ocean)

Mountain Biomes Snowy Slopes

Volcanic Peaks (Stony Peaks)

Frozen Peaks

Jagged Peaks

Misc Stony Peaks

Burnt Plains (Desert)

Aomori Isle (Mushroom Fields)

The Nether

Yomi

"When the creator goddess Izanami gave birth to Kagutsuchi, the kami of fire. Her husband, Izanagi, fueled by grief, marched down to retrieve her in Yomi, the land of the dead. The place where all who die make home."

Yomi, also known as the Land of the Dead, is the replacement for the Nether dimension. While being virtually identical to the Vanilla Nether, the flaming hot visuals have been replaced with a cold blueish-green to personify the world of darkness much more effectively. This realm is home to many yokai such as the Shikome, Keneō, Okubi, Yurei, Datsue-ba, Wa nyūdō, and Katawaguruma. Homes can be found along the Sanzu River, containing lost souls known as Shiryō, who will trade and sell valuable Yomi artifacts. 

NOTE FOR SHADER USERS:  You may have to configure your shaders if you want to gain this misty blue color palette.

Sanzu River (Nether Wastes)

Soul of Kagutsuchi (Basalt Deltas)

Wisteria Grove (Crimson Forest)

Weeping Forest (Warped Forest)

Soul Sand Valley

The End

Ryugu-jo

"Ryūgū is a fantastical palace that appears in many legends and folktales. It is the primary residence of the dragon god of the sea and his daughter Otohime, and is home to the ocean’s royal court. The palace is populated by aquatic creatures who wear human clothing and have a society which mirrors that of the human world." -Yokai.com

Ryūgū-jō is the alternate of the End dimension of this data and resource pack. Replacing the Ender Dragon with the great Sea Dragon known as Ryūjin. One of the more notable changes is that the previous void of the End has been flooded with a vast ocean filled with coral and other ocean life. 

NOTE FOR SHADER USERS:  I don't recommend shaders for this dimension. A lot of shader packs cater to the vanilla end and often block out the cool skybox.

Ryūgū-jō (The End)

Ryūgū-jō Reef (End Midlands)

Ryūgū-jō Highlands (End Highlands)

Ryūgū-jō Ocean (End Barrens)

Small Reef Islands (Small End Islands)

STRUCTURES

Vanilla Structures Plains Village

Taiga Village

Savanna Village (Now Market Village)

Snowy Village

Desert Village (Now Burnt Village)

Swamp Hut

Bastion Remnant (Replaced with Oni Castle)

Ancient City

Trial Chambers

Fortress (Replaced with Temple of Izanami)

Desert Temple (Replaced with Destroyed Pagoda)

Jungle Temple

Woodland Mansion (Replaced with Warlord Castle)

Stronghold (Replaced with Entrance to Ryūgū-jō)

End City (Replaced with Ryūgū-jō Palace)

Ocean Monument

Igloo (Replaced with Snow Hut)

Pillager Outpost (Replaced with Bandit Outpost)

Sunken Ships

New Structures Outskirt Villagers and Inns

Abandoned Manors

Castle Ruins

Minka Villages

Shinto Shrines

Pagodas

Buried Palace

Yomi Houses

Cemeteries

Boats

Inari Shrines

Kaeru Shrines

Castles (Plains)

Castles (Winter)

Farmsteads

Lighthouses

Swamp Villages

Temple Villages

MOBS:

Yokai

• Kodama (Allay)
• Hitokai (Armadillo)
• Ubagabi (Blaze)
• Nure Onago (Bogged)
• Kaze no Kami (Breeze)
• Tsuchigumo (Cave Spider)
• Kodama Nezumi (Creepers)
• Kappa (Drowned)
• Umibōzu (Elder Guardian)
• Ryūgū no tsukai (Elder Guardian)
• Ryūjin (Ender Dragon)
• Kuchisake Onna (Enderman)
• Yurei (Enderman)
• Funayurei (Enderman)
• Tsuchinoko (Endermite)
• Ōkubi (Ghast)
• Teruto uo (Glow Squids)
• Gashadokuro (Giant)
• Umiotoko (Guardian)
• Kamiike hime (Guardian)
• Otoroshi (Hoglin)
• Nuppeppō (Husk)
• Daimajin (Iron Golem)
• Tsurubebi (Magma Cube)
• Kudan (Mooshroom)
• Kanashibari (Phantom)
• Keneo (Piglins)
• Datsueba (Piglins)
• Gozuki (Piglin Brute)
• Ushi Oni (Ravager)
• Kaichigo (Shulker)
• Tsutsugamushi (Silverfish)
• Skeleton (yours truly)
• Bakotsu (Skeleton Horse)
• Tsurube otoshi (Slime)
• Hakutaku (Sniffer)
• Oshiroi Babā (Snow Golem)
• Jorogumo (Spider)
• Tsurara-Onna (Stray)
• Yuki-Onna (Stray)
• Wa nyudo (Strider)
• Katawaguruma (Strider)
• Tengu (Vex)
• Ōzatō (Warden)
• Yamauba (Witch)
• Maikubi (Wither)
• Shinigami (Wither Skeleton)
• Waira (Zoglin)
• Oni (Zombies)
• Sagari (Zombie Horse)
• Dorotabō (Zombie Villager)
• Shikome (Zombified Piglin)

Animals

• Ōsanshōuo (Axolotl)
• Hakushika (Camel)
• Deer (Llama)
• Yamamayaa (Ocelot)
• Tanuki (Panda)
• Crow (Parrot)
• Boar (Pig)
• Black Bear (Polar Bear)
• Carp (Salmon)
• Koi Fish (Tropical Fish)
• Minor texture changes to the rest of the mobs to fit their theme.

People

• Samurai Bandits (Vindicators)
• Bandit Cheif (Evoker)
• Ashigaru Bandits (Pillagers)
• Shinobi (Illusioners)
• Villagers (You guessed it)
• Wandering Merchant (You get the idea)

Updated Textures:

Blocks/Items

• Oak Wood
• Spruce Wood (Now Black Pine)
• Birch Wood
• Jungle Wood (Now Kiso Cypress
• Acacia Wood (Now Keyaki)
• Dark Oak Wood (Now Dark Cedar)
• Cherry Wood (Now Sakura)
• Bamboo Wood
• Mangrove Wood
• Crimson Wood (Now Bloodgood Maple)
• Warped Wood (Now Weeping Willow)
• These wood changes apply to planks, logs, doors, trapdoors, fences, signs, boats, etc.
• Deepslate Tiles (Now Deepslate Shingles)
• Deepslate Bricks
• Polished Deepslate
• Stone Bricks
• Chiseled Stone Bricks
• Mossy Stone Bricks
• Cobblestone
• Mossy Cobblestone
• Sandstone
• Cut Sandstone
• Smooth Sandstone
• Blackstone Bricks (Now Blackstone Shingles)
• End Stone (Now Coral Stone)
• End Stone Bricks (Now Coral Stone Bricks)
• Quartz Bricks
• Quartz Block
• Chiseled Quartz
• Smooth Quartz
• Quartz Pillar
• Bricks (Now Shingles)
• Sea Lantern
• Prismarine
• Prismarine Bricks
• Dark Prismarine
• Netherrack (Now Ash)
• Nether Brick (Yomi Brick)
• Red Nether Brick (Red Yomi Brick)
• Purpur Blocks
• Purpur Pillars
• Gold Block
• Iron Block
• Diamond Block
• Emerald Block (Jade Block)
• Redstone Block
• Crimson Nylium (Bloodgood Nylium)
• Warped Nylium (Weeping Nylium)
• Nether Wart Block (Bloodgood Leaves)
• Warped Wart Block (Weeping Willow Leaves)
• Brown Mushroom Block
• Red Mushroom Block
• Packed Ice
• Magma Block (Changes colors in Yomi)
• Calcite
• Polished Diorite
• Glowstone
• Mangrove Roots
• Shroomlight
• Red Sandstone
• Red Sand
• Hay Block
• Ochre Froglight
• Verdant Froglight
• Pearlescent Froglight
• Gravel
• Sand
• Functional Blocks
• Crafting Table
• Barrel
• Bookshelves
• Chiseled Bookshelves
• Lanterns
• Soul Lanterns
• Torches
• Spawners (Now Stone Lanterns)
• Vaults (Now Shrine of Susanoo)
• Trial Spawners
• Beds
• Furnace
• Smoker
• Blast Furnace (Now a Tatara Furnace)
• Composter
• Enchanting Table (Now Juyosho)
• Chest
• Ender Chest (Now Tsukumogami Chest)
• Flower Pot
• Suspicious Sand
• Suspicious Gravel
• Glass (Now Shoji Frame)
• Tinted Glass (Now Tinted Shoji)
• White Stained Glass (White Stained Shoji)
• Brown Stained Glass (Covered Shoji)
• Light Gray Stained Glass (Lightly Damaged Shoji)
• Gray Stained Glass (Damaged Shoji)
• Black Stained Glass (Empty Shoji)
• Red Stained Glass (Red Stained Shoji)
• Blue Stained Glass (Blue Stained Shoji)
• Purple Stained Glass (Purple Stained Shoji)
• Green Stained Glass (Green Stained Shoji)
• Yellow Stained Glass (Yellow Stained Shoji)
• Orange Stained Glass (Damaged Yellow Stained Shoji)
• Lime Stained Glass (Solid Yellow Stained Shoji)
• Pink Stained Glass (Sakura Stained Shoji)
• Magenta Stained Glass (Blank Sakura Stained Shoji)
• Light Blue Stained Glass (Golden Stained Shoji RIGHT)
• Cyan Stained Glass (Golden Stained Shoji LEFT)
• All Carpets
• All Wool
• All Shulker Boxes (Now Kaichigo Boxes)
• TNT (Now Black Powder Keg)
• Iron Door
• Iron Trapdoor
• Torches
• Soul Torches
• Redstone Torches
• Decorated Pots (Now Porcelain Vases)
• Piston
• Sticky Piston
• Beacon (Now Sun Goddess Shrine)
• Bell
• Plants
• Grass
• Tall Grass
• Fern
• Large Fern
• Bamboo
• Lilac (Now Pampa Grass)
• Peony (Now Silver Grass)
• Lily of the Valley (Now Short Pampas Grass)
• Blue Orchid (Now Short Silver Grass)
• Rose Bush (Now Wisteria Bush)
• Poppy (Now Flowering Quince)
• Dandelion (Now Kerria)
• Allium (Now Iris Shobu)
• Azure Bluet (Now Japanese Anemone)
• Red Tulip (Now Red Spider Lily)
• Orange Tulip (Now Sanguine Lily)
• White Tulip (Now Ajisai)
• Pink Tulip (Now Shibazakura)
• Oxeye Daisy (Now White Oriental Lily)
• Cornflower (Now Nemophila)
• Pitcher Plant (Now Ginkgo Bonsai)
• Torchflower (Now Chrysantheum)
• Crimson Roots (Now Bloodgood Bush)
• Lily Pads
• Wither Rose (Now Fruit of Yomi)
• Chorus Plant (Now Dragon Stem)
• Chorus Flower (Now Dragon Flower)
• Crimson Fungus (Now Bloodgood Sapling)
• Warped Fungus (Now Weeping Willow Sapling)
• Oak Sapling
• Birch Sapling
• Spruce Sapling (Now Black Pine Sapling)
• Dark Oak Sapling (Now Dark Cedar Sapling)
• Jungle Sapling (Now Kiso Cypress Sapling)
• Acacia Sapling (Now Keyaki Sapling)
• Mangrove Sapling (Potted)
• Apples (Now Peaches)
• Golden Apples (Now Kaki)
• Enchanted Golden Apples (Now Divine Kaki)
• Pumpkins
• Carved Pumpkin
• Jack-o-Lantern
• Food/Consumables
• Beetroot (Now Soybeans)
• Pumpkin Pie (Now Kaboocha)
• Melons (Now Yubari Melon)
• Carrots (Now Daikon Radish)
• Chorus Fruit (Now Dragon Fruit)
• Potatoes (Now Rice)
• Baked Potatoes (Now Rice Ball)
• Beetroot Soup (Now Miso Soup)
• Rabbit Stew (Now Somen Noodles)
• Bread (Now Somen)
• Cookies
• Cake (Now a big sushi)
• Potions (Now Sake)
• Ominous Bottle
• Ender Pearl (Now Jade Pearl)
• Eye of Ender (Now Tide Pearl)

Tools/Weapons/Equipment/Misc

• All Wooden Tools
• All Stone Tools
• All Iron Tools
• All Golden Tools
• All Diamond Tools
• All Netherite Tools
• Wooden Sword (Now Bokken)
• Stone Sword (Now Kanobo)
• Iron Sword (Now Iron Katana)
• Golden Sword (Now Golden Katana)
• Diamond Sword (Now Diamond Katana)
• Netherite Sword (Now Hihirokane Katana)
• Trident (Now Ame-no-Nuboko)
• Mace (Now Kusanagi no Tsurugi) (NOTE: Can be renamed to "Tetsubo" if you prefer a blunt weapon)
• Crossbow (Now Tanegashima)
• Wolf Armor
• Spectral Arrows (Now Musket Balls)
• Shields (Now Sheathed Parry Swords)
• Bow
• Arrows
• Tipped Arrows (Kunai Arrow)
• Leather Armor
• Chainmail Armor (Now Shinobi Gear)
• All Helmets (Now Kabuto)
• All Chestplates (Now Dō)
• All Leggings (Now Haidate)
• All Boots (Now Kusazuri)
• Elytra (Wings of Tengu)
• Name Tags
• All Netherite Material (Now Hi'hirokane)
• Totem of Undying (Now Charm of Undying)
• Enchanted Books (Now Omamori)
• Turtle Helmet (Now Mask of Genbu)
• Emeralds (Now Jade)
• Scute (Now Scales of the Black Tortoise)
• Firework Rocket
• Nether Star (Now Omamori of Amaterasu)
• Wither Skeleton Skull (Severed Warlord Head)
• Rabbit's Foot (Now Shides)
• Slime Ball (Now Flesh Tissue)
• Nether Brick (Now Yomi Brick)
• All Pottery Shards
• All Paintings

With the Resource Pack, expect the names for all replaced items/blocks/mobs/biomes in-game along with their changes.

EXPECTED QUESTIONS W/ ANSWERS:

"Why can't I craft X?":

 Some Crafting Recipes have been changed to better fit the theme or just for QoL purposes. Here are the changes:

Sorry if there is any confusion!

"Why are creepers mice now? They're so small I can barely see them! >:( are you stupid?":

  The Kodama Nezumi is a type of yokai that is described as a regular ball mouse that swells up and explodes upon contact. The only yokai I could think of that could be equivalent to the Creeper. Their hitboxes remain the same, however it is now easier for them to sneak up on you due to the dramatic grass textures and their size. To counter this I made it so this mob has the lowest base HP of any mob so you can quickly defuse them when caught. I also lowered their spawn chances to make it less annoying. For you gunpowder farmers, I have made gunpowder a craftable item in response.

           Source: yokai.com

"Biome changes have made X block unobtainable.":

  With Changes to "western" biomes. Blocks like Terracotta and Cactuses no longer spawn naturally. However, I did make changes that make up for it.

Terracotta can be purchased in large numbers from the Tinsmith Villagers Cocoa Beans and Cactuses can be found in chests in some villages. Note: Green dye is now made from yellow + blue dye instead of smelting cactuses. All Purpur Blocks can be found in chests in Ryūgū-jō (End City) structures. Red Sand can be found in chests of Burnt Plains Villages