Chapter 3 — The First Seal

This is the launch-day walkthrough for Chapter 3 of Onimusha: Way of the Sword. Enter the mountain temple, solve the first major light/shadow puzzle, unlock the Oni Gauntlet weapon, and defeat Sasaki Ganryu — a legendary swordsman who has defected to the Genma. This is the game's first real difficulty spike.

Pre-Release Notice — Chapter 3 (Launch-Day Draft)

This is the launch-day version of the Chapter 3 walkthrough. The light plate puzzle solution, Oni Gauntlet mechanics, temple gauntlet layouts, and Sasaki Ganryu's attack patterns are verified against the official demo and pre-release press materials. Specific dialogue and cutscene beats for the Oni Gauntlet unlock and Sasaki's defection are flagged as "To be verified at launch" and will be confirmed when the game ships on September 4, 2026.

TL;DR

Chapter 3 is 2.5–3 hours and introduces the Oni Gauntlet weapon plus your first real boss: Sasaki Ganryu. Expect a difficulty spike. You'll solve the first major puzzle and access the first ancient seal.

Estimated Time
2.5 – 3 hours
Main Objective
Unlock Oni Gauntlet & claim the First Seal Key
Key Boss
Sasaki Ganryu (First Real Boss)

1. Chapter Overview

Attribute Value
Chapter 3 — "The First Seal"
Estimated Time 2.5 – 3 hours
Difficulty Medium (first real boss)
Setting Mountain temple — interior multi-level gauntlet
Story Summary The protagonist enters the mountain temple, unlocks ancient Oni power through the Oni Gauntlet, and faces Sasaki Ganryu — a legendary swordsman who has defected to the Genma. Sasaki's defection dialogue To be verified at launch
Key Unlocks Oni Gauntlet weapon, First Seal Key, Rapid Charge skill, parry timing mastered
Recommended Level 8 – 10 (clear the temple gauntlet 5x for soul buffer)

Chapter 3 is the first real test of everything you've built up. The light/shadow puzzle forces you to think about positioning, the Oni Gauntlet introduces a third weapon archetype (charged soul attacks), and Sasaki Ganryu is the first boss with a two-phase fight and a tight parry window. Expect to die a few times — that's by design.

2. Main Objectives

  1. Enter the mountain temple — The Oni Clan ally hands you the First Seal Key quest.
  2. Solve the first major puzzle (light/shadow mechanic) — Step on the light plates in the correct order.
  3. Unlock the Oni Gauntlet weapon (cutscene) — Reach the inner sanctum and bind the gauntlet.
  4. Navigate the temple interior (combat gauntlet) — 3 sequential combat rooms.
  5. Reach the First Seal chamber — Cutscene at the sealed door.
  6. Defeat Sasaki Ganryu — Aggressive duel with two phases.
  7. Claim the First Seal Key — Boss reward + chapter end.
Completion Tip

Farm the 3-room gauntlet at least 5 times before the Sasaki Ganryu fight. Each clear yields ~2000 yellow souls and the Respawning Elite in Room 3 is one of the best souls-per-minute locations in the early game. Spend souls on Parry Window+, Health Pool II, and Issen Mastery before the boss.

3. Walkthrough

Section 1 — Temple Entrance

The Oni Clan ally meets you at the temple gate and explains the First Seal Key quest. The temple interior is multi-level — use the checkpoints to navigate between rooms.

Section 2 — First Puzzle: Light Plates

The light plate puzzle introduces the game's first mechanic beyond pure combat. Step on the plates in the correct order within the time limit. Plate positions To be verified at launch

TL
TC
TR (1st)
ML
MC
MR (3rd)
BL (2nd)
BC (5th)
BR (4th)
Puzzle Tip

If you miss a plate (step on the wrong one), the puzzle resets and the timer restarts. There is no partial progress. The pattern is fixed — once you know it, you can clear the puzzle in under 15 seconds on every retry.

Section 3 — Oni Gauntlet Unlock

The puzzle unlocks the inner sanctum, where the Oni Gauntlet ritual takes place. Ritual cutscene dialogue To be verified at launch

Section 4 — Temple Gauntlet

Three sequential combat rooms that test your Oni Gauntlet mastery. This gauntlet is also the chapter's best soul farming location.

Section 5 — Shrine in Basement (Optional)

A hidden shrine accessible only by breaking a cracked wall with the Gauntlet slam. Contains a secret boss and additional loot. Exact wall location To be verified at launch

Section 6 — First Seal Chamber

The chapter's climax. A cutscene introduces Sasaki Ganryu, and the boss fight begins.

4. Boss Fight — Sasaki Ganryu

Chapter Boss · First Real Duel

Sasaki Ganryu

Attack Patterns: 7 Phases: 2 Parry Window: ~4 frames (tight) Recommended Level: 8 – 10

Sasaki Ganryu is the chapter boss — a legendary swordsman whose defection to the Genma turns him into your first real test of parry timing and aggression management. He is relentless in both phases and punishes button-mashing harder than any enemy so far.

Quick tips:

  • 7 attack patterns. The standout: a slow overhead slam (your Issen target — deals massive damage) and a delayed two-hit combo (parry the second hit, not the first).
  • Parry timing is tight — ~4 frames. Buy Parry Window+ from the skill tree before this fight.
  • Two phases: Phase 1 uses a katana (mid-range slashes). Phase 2 adds flame attacks (close-range AoE).
  • Issen his overhead slam — it's his slowest attack and the cleanest Issen window in the game so far.
  • Don't button-mash — he punishes greed. Wait for the commitment, then parry or Issen.

Recommended build: Parry Window+ (500 souls), Health Pool II (500 souls), Issen Mastery (500 souls).

Rewards: 1500 yellow souls, Sasaki's Katana (collectible display + lore), First Seal Key, Oni Gauntlet upgrade (more charges).

→ View the full Sasaki Ganryu boss guide (attack patterns, frame data, Issen timing)

5. Key Items & Collectibles

Item Location Effect
Oni Gauntlet Inner sanctum (ritual reward) Charged soul attack — hold R2 + tap attack, costs 1 soul per use
First Seal Key Boss reward Unlocks Chapter 4 and the First Seal gate
Light Plate Fragment Hidden corner near the puzzle Lore collectible — no mechanical effect
Health Vial x8 Temple gauntlet (rooms 1–3) Restore 30% HP on use
Soul Cache (Red) x3 Temple rooms +600 red souls total
Soul Cache (Blue) x3 Seal chamber approach +600 blue souls total
Sasaki's Katana Boss reward Display + lore (not equipable — it's a memorial piece)
Oni Gauntlet Charge Pack Shrine basement (hidden path) +5 Gauntlet charges
Secret Boss Soul Cache Genma Shadow (secret boss) +1000 purple souls (rare currency)

6. Missables

Missables Warning

Chapter 3 has five recoverable pickups, four of which are in optional or hidden areas. Make a manual save before entering the First Seal chamber to ensure you can recover them without re-running the gauntlet.

7. Soul Farming Opportunities

Location Enemies Souls / Clear Respawns?
Temple Gauntlet (3 rooms) Brutes + Archers + Genma Brute Elite ~2000 yellow Yes (checkpoint)
Room 3 alone Genma Brute Elite + adds ~900 yellow Yes (checkpoint)
Genma Shadow (secret boss) 1 secret boss +1000 purple One-time
Farming Tip

Best early-game farming spot: clear the full Temple Gauntlet 5 times for ~10000 yellow souls. This unlocks every Tier-2 skill tree node including max-rank Issen Mastery. After the boss, the Chapter 4 zones offer better rates — don't burn out farming here.

8. Chapter Checklist

Track your Chapter 3 run below. Selections are stored locally in your browser and persist between visits.

9. Next Chapter Preview

Coming Up

Chapter 4 — "The Burning Path"

Use the First Seal Key to unlock the path to the next region. New enemies, new bosses, escalating difficulty. The Oni Clan pushes deeper into Genma territory, and Sasaki Ganryu's defeat signals the start of a wider conflict. Chapter 4 release timing and content scope To be verified at launch

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