Japan's natural landscape is mostly dominated by temperate forests and mountainous regions. Rather than just deleting vanilla biomes, each has been overhauled — for example, the Badlands have been reworked into an Autumnal Forest with rich warm colors replacing the red rock and sand. Biomes are divided by seasonal characteristics so transitions feel natural and cohesive.

"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 replaces the Nether. The flaming hot visuals have been swapped for a cold blueish-green palette to better embody the world of darkness. Home to many yokai and the lost souls known as Shiryō, who trade valuable Yomi artifacts along the Sanzu River.

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

Sanzu River · Soul of Kagutsuchi · Wisteria Grove · Weeping Forest · Soul Sand Valley

"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." — Yokai.com

Ryūgū-jō replaces the End, and the Ender Dragon has been replaced with the great Sea Dragon, Ryūjin. The void of the End has been flooded with a vast ocean filled with coral and ocean life.

NOTE FOR SHADER USERS: I don't recommend shaders for this dimension — most shader packs cater to the vanilla End and often block out the skybox.

Ryūgū-jō · Ryūgū-jō Shore · Ryūgū-jō Highlands · Ryūgū-jō Ocean · Ryūgū-jō Reef

Per Wood Type:

• Shoji Doors (Single, Double, and Triple)
• Shoji Trapdoors
• Shoji Panels — Customizable with white/yellow dye, sheers, and paper. Available in Regular, Checkered, Paly, and Covered varieties.
• Tatami Blocks and Mats — Feature axis-based placement.
• Tansu Cabinets
• Lacquered Logs and Wood — Apply urushi from tree sap to alter their appearance.
• Shikkui — Now available for each wood type, no longer limited to Shirasu Kabe.
• White and Yellow Shirasu Kabe

Standalone:

• Boiling Pot — Extension of the Smoker, used to brew tea. Can be placed on the ground or ceiling.
• Grass Bed — Early-game bed crafted from foliage.
• Sake Brewery — Brew Fermented Sake from Rice, Koji Mold, and other ingredients.
• Sake Barrel — Process Fermented Sake over time.
• Paper Lanterns
• Stone Lanterns — Available in Stone, Cobblestone, Mossy Cobblestone, Stone Bricks, Mossy Stone Bricks, Diorite, Andesite, Cobbled Deepslate, and Tuff variants.
• Shides — Place against walls to ward off yokai.
• Reed Blocks — Pale and dark variants intended for thatched roofing.
• Decorative Baskets
• Iron Sand — Found in riverbeds. Used to craft Tamahagane-tier tools.
• Coarse Farm Dirt — Used for empty paddy field farm pieces.
• Willow Vines — For Sakura and Mangrove trees.

• Rice — Can be planted in mud or shallow water.
• Tea — Grown from Tea Seeds into Tea Leaves, then brewed in the Boiling Pot. Grants a brief Haste buff.
• Fermented Sake — A weaker version of Sake that must be processed in a Sake Barrel.
• Sake — An early-game potion alternative. Grants Strength and Drunk effects.
• Ramie Fibre — Replaces wool production, as sheep were not present in the Sengoku Era. Seeds found in ferns; crafts into string and then Linen.
• Raw Tamahagane / Tamahagane Ingots — The replacement for Iron-tier tools and weapons.
• Ginkgo, Maple Leaves and Saplings

Available in Wood, Iron, Tamahagane, Gold, Diamond, and Hi'hirokane:

• Tanto — High attack speed dagger. Can perform stealth kills on unsuspecting enemies.

• Tetsubo — Blunt weapon with decent speed and range.

• Kanabo — Like the Tetsubo, but slower with more range and damage.

• Yari — Fast thrusting spear with a vertical slash added for variety.

• Naginata — Wide-swinging polearm with lower attack speed than the Yari.

• Odachi — High damage, high range, low attack speed. Built-in knockback. Deals bonus posture damage.

• Kunai — Throwable ammo. Comes in Slowness, Poison, and Weakness variants. Deals critical damage to unsuspecting enemies.

  All weapons, including Vanilla Swords and Axes, support the blocking mechanic. Better Combat is not required, but strongly recommended.

Unique Weapons:

The Seigun Smithing Template is dropped by the Warlord and is used to craft all unique weapons and armor. Like other smithing templates, it must be duplicated to be used multiple times. Secondary ingredients are Broken Hilts and Armor pieces, both found in castle chests. All unique gear is upgradeable to Hi'hirokane tier.

• Blade of the Kensei
• Naginata of the Nobushi
• Kanabo of Otakemaru
• Tetsubo of the Hatamoto
• Odachi of the Shugodai
• Yari of the Taisho
• Tanto of Tamatori Hime
• Splitting Axe of Kintaro

• Straw Hat — Grants mining efficiency.

• Sando Hat — Grants extended block placement range.

• Tengai Hat — Grants sneak speed.

• Straw Cape — Grants water movement efficiency.

  • All three come in black and white variants.

• Shinobi Armor — Crafted in a smithing table via the Ryoshin Smithing Template with Leather Armor. Grants movement speed, sneak speed, and increased jump height at the cost of lower defense.

• Daimyo Armor — Late-game armor crafted via the Seigun Smithing Template. Upgradeable to Hi'hirokane tier.

• Bandits — Usually carry wooden weapons or bows.
• Ronin — Early-game swordsmen equipped with Iron Katanas. Can block and parry. Scale in equipment as the player progresses.
• Samurai — Carry Tamahagane weapons and patrol the world on horseback. Can block and parry. Comes in Takeda, Kobayakawa, and Satomi variants.
• Ashigaru — Ranged fighters carrying Tanegashima firearms. Comes in Takeda, Kobayakawa, and Satomi variants.
• Sohei — Extends Evoker AI. Comes in Takeda, Kobayakawa, and Satomi variants. Has a chance to drop their clan's banner pattern.
• Shinobi — Throws Kunai and has melee attacks.
• Shinobi Lord — A more powerful Shinobi variant that can teleport toward the player found deep within Abandoned Dojos. Drops the Ryoshin Upgrade Template upon death.
• Warlord — A boss dueled at the top of Warlord Castles. Can block, parry, and deflect projectiles. Drops a smithing template to upgrade weapons and armor.
• Villagers — Upgraded Ai; Stricter survival tactics, Updated shop loot, Better pathing.

• Goryo — Ghost versions of Ronin and Samurai. Spawn in Yomi.
• Gaki — Zombie/Husk-like enemies in Yomi that apply the Hunger debuff.
• Onikuma — A large bear-like yokai that spawns in forests.
• Sarugami — Demonic monkeys found in the mountains. Usually carry Iron Katanas. Burns in sunlight.
• Hitotsume-Nyudo — An immense robed cyclops that towers over open fields. Burns in sunlight.
• Omukade — A massive multi-segment centipede made of multiple entities. Spawns in Lush Caves and occasionally on the surface. Applies Poison.
• Oni Brute — A rare, larger variant of the Oni (Zombie).
• Maikubi — Three spinning heads that spit fire. Found in Yomi.
• Kojin — Shark merfolk found in oceans.
• Umi Nyōbō — High-damage melee/ranged hybrids equipped with Diamond Naginatas. Found in Ryūgū-jō. Also spawn during Ryūjin's second phase.
• Ningyo — Fast merfolk that spawn in Ryūgū-jō in high numbers.
• Kamiike Hime — Fish yokai with human faces. Uses Guardian AI.
• Akugyo — A massive sea monster guarding the entrance to Ryūgū-jō. Applies the Curse of Umi Bōzu (Mining Fatigue) and breathes fire.
• Umi Inu — Vicious shark-like sea predators. Spawn in deep oceans and gnaw on boats.
• Ikuchi — A giant multi-segment eel boss lurking in the deep ocean. Circles the player between attacks.
• Umibōzu — The iconic sea giant of Japanese folklore. Emerges from the depths on calm nights to slow your boat and attempt to sink it. Distract it by throwing a Barrel into the water.
• Yuki Onna — A rare boss that appears at night in snowy biomes after the player has obtained diamonds. Stalks the player and breathes ice.
• Gashadokuro — A giant boss that spawns in the Burnt Plains at night.
• Kodama (Allay) — Spawn in Dark Forests
• Hitokai (Armadillo) — Spawn in Aomori Isles
• Ubagabi (Blaze) — Spawn in Volcanic Peaks
• Nure Onago (Bogged)
• Kaze no Kami (Breeze) — Spawn in Snowy Slopes and Frozen Peaks
• Tsuchigumo (Cave Spider) — Much larger and tankier.
• Kodama Nezumi (Creeper) — Smaller model and HP reduced to 1.
• Kappa (Drowned) Slightly — Smaller.
• Uo Bōzu (Elder Guardian)
• Ryūjin (Ender Dragon)
• Kuchisake-Onna (Enderman) — Spawns rarely one at a time and stalks the player at night.
• Yurei (Enderman)
• Funayurei (Enderman)
• Tsuchinoko (Endermite) — Spawns in Swamps
• Ōkubi (Ghast)
• Teruto Uo (Glow Squid) — Spawns in Ryugu-Jo
• Umiotoko (Guardian) — Spawn sometimes in oceans
• Otoroshi (Hoglin) — Spawn in a couple overworld biomes.
• Nuppeppō (Nuppeppō)
• Tsurubebi (Magma Cube)
• Kudan (Mooshroom)
• Kanashibari (Phantom)
• Keneo (Piglin)
• Datsue-ba (Piglin)
• Gozuki (Piglin Brute)
• Ushi Oni (Ravager) — No longer spawn in raids and instead as a solo spawn on beaches and shores.
• Kaichigo (Shulker) — Spawn in certain Overworld structures.
• Tsutsugamushi (Silverfish) — Spawn in mineshafts.
• Bakotsu (Skeleton Horse) — Much faster and cooler. Spawns in Bastion Remenants.
• Tsurube Otoshi (Slime)
• Oshiroi Babā (Snow Golem)
• Hakutaku (Sniffer)
• Jorogumo (Spider)
• Tsurara-Onna (Stray)
• Wa Nyūdō (Strider)
• Katawaguruma (Strider)
• Tengu (Vex) — Much larger.
• Ōzatō (Warden) — Larger, much scarier, and has a boss bar.
• Yamauba (Witch)
• Tatarigami (Wither)
• Shinigami (Wither Skeleton)
• Waira (Zoglin)
• Oni (Zombie)
• Sagari (Zombie Horse) — Chance to spawn upon every Horse death
• Dorotabō (Zombie Villager)
• Shikome (Zombified Piglin)

• Ōsanshōuo (Axolotl) — Can spawn in rivers. Has a new ambush system based on real salamander behavior.
• Hakushika (Camel) — Much faster. Rare spawn among deer.
• Crows — Ambient birds with their own sounds.
• Macaques — Travel in packs and flee from wolves.
• Red Crowned Cranes — Flee from sprinting players. Use the Chicken loot table.
• Hornets (Bees) — Based on the Giant Asian Hornet. Hives produce paper instead of honey.
• Deer (Llama) — Much faster. Will flee from players until tamed.
• Yamamaya (Ocelot)
• Tanuki (Panda) — Faster and smaller.
• Birds/Warblers (Parrot)
• Boar (Pig) — Neutral mob that attacks when provoked.
• Black Bear (Polar Bear) — Attacks on sight.
• Carp (Salmon)
• Koi Fish (Tropical Fish) — Found rarely in rivers. Comes in real-life Koi patterns.
• Searows (Goat) — Now spawn in forest areas, mimicking the Japanese Serow.
• All mammalian mobs drop Animal Hide and Meat.
• Sheep have been removed — not present during the Sengoku Era and I couldnt find a worthy replacement. Sorry
• Chickens and Oxen are no longer wild mobs and are found only in villages.

• Enemies will not detect players they aren't facing unless noise is made or the player gets too close. A "!" indicator appears above a mob's head when it detects you.
• Attacking an unsuspecting enemy triggers a critical strike. Using a Tanto will insta-kill most mobs.
• Concealing yourself in foliage reduces detection range significantly.
  • Tall Grass reduces detection to 1 block.
  • Short Grass reduces it to 5 blocks.
• All Smoke Bombs (splash potions) grant a brief invisibility buff. Armor is no longer rendered while invisible, and mobs immediately lose track of you.

• Blocking with your weapon (right-click) is back and functional for Katanas, Axes, and all modded weapons.
• Blocking has distinct sounds and particles.
• Taking hits while blocking applies Posture damage. Posture breaks temporarily prevent blocking and regenerates over time.
• Certain weapons (Odachi, Tetsubo, Kanabo) deal bonus Posture damage.
• Samurai, Ronin, Umi Nyōbō, and Goryo also use this system.

Water near surface-level magma blocks emits mist particles. Idle players in the water receive a Saturation buff.

Surface monster spawn rates scale with the moon phase. Spawn rates are at 0% on a Full Moon and rise to 100% on a New Moon (Blood Moon). Underground spawn rates are unaffected. Certain manually-triggered spawns like Oni Patrols and Kuchisake-Onna are exempt.

The music system has been completely reworked with context-sensitive tracks for day/night, combat, underground depth, village and castle zones, and boss encounters. Credit to the orginal artists, all music tracks used can be found in this playlist.

After rainfall, mist particles appear across the surface for a brief duration. A second set of fog particles is available but disabled by default — enable it via Mod Menu if you have the hardware for it. Particle counts are capped based on nearby entities to prevent frame drops.

Added blood particles to combat.

The tool progression system has been reworked. Vanilla "Stone" tools are now functionally Iron, and vanilla "Iron" tools are now Tamahagane. The new order is: Wood → Iron → Tamahagane → and so on.

Upgrading to Tamahagane works like the Diamond-to-Netherite upgrade — you'll need a smithing template and a Tamahagane Ingot at a smithing table. To make a Tamahagane Ingot, gather Iron Sand from riverbeds with an Iron Shovel, smelt it into Raw Tamahagane, and combine it with Iron Ingots.

Compensations made for this change:

• Iron Ore can now be mined with a Wooden Pickaxe.
• More Raw Iron is obtained per Iron Ore.
• Tamahagane Tools are significantly more durable than vanilla Iron tools.

Sheep have been removed from all biomes. In their place:

• String can be crafted from Ramie Fibre, which is grown from seeds found in ferns.
• The Grass Bed can be crafted from Reeds for a quick first-night solution without needing to farm.
• Mutton has been replaced with Squid Meat, which drops from Squid.
• Acquiring dyed wool is now more accessible via an adjusted crafting recipe.