Onimusha Max Upgrade Path: How to Fully Upgrade Everything

Fully upgrading everything in Onimusha: Warlords means three things: maxing all three elemental weapons (Raizan, Enryuu, and Shippuu), collecting every Power Jewel and Magic Jewel to raise your maximums, and obtaining the Bishamon Sword from the Dark Realm to complete Samanosuke's arsenal. Together, these constitute the game's 100% upgrade state, and reaching it unlocks the corresponding completion rewards and achievements in the remaster.

The catch is that none of it happens passively. Red souls to max weapons must be farmed, jewels are finite and hidden, and the Bishamon Sword requires clearing the survival mini-game. A blind first run will almost always finish the story with at least one weapon under-leveled and several jewels missed, which is why the realistic path to fully upgraded is a two-pass effort.

This guide lays out the efficient path: what to prioritize on your first run, what to defer to Ultimate Mode, and how to use the Dark Realm to close the gap. Follow it and you reach the finale -- and 100% completion -- with a maxed toolkit.

What Fully Upgraded Means

Maxing All Three Elemental Weapons

Maxing all three elemental weapons is the longest part of the upgrade path, because red souls are a shared currency and each weapon has its own tree. On a first playthrough, you will not have enough souls to max all three; the realistic goal is to max one weapon and half-level a second by the finale. Pick Enryuu as your main and pour souls into it until it is maxed, then branch into Raizan or Shippuu.

To finish the remaining weapons, turn to the Dark Realm. Its endless waves drop souls far faster than story farming, so a few deep runs bank enough red souls to max the second and third weapons back at the shrines. This is the single most efficient way to close the gap after your first clear.

In Ultimate Mode, your weapons start maxed, which removes the farming pressure entirely and lets you focus on collectibles. Use Ultimate Mode not to re-grind weapons but to sweep the world for jewels and Fluorites while enjoying the maxed arsenal. The Dark Realm remains the farming engine if a version or achievement requires you to earn the maxes yourself.

Collecting All Power and Magic Jewels

Power Jewels and Magic Jewels cannot be farmed -- there is a fixed number of each, hidden throughout the castle -- so collecting all of them is purely an exploration challenge. Each Power Jewel raises your maximum health and each Magic Jewel raises your maximum magic, so a complete set gives you the largest possible health and magic pools, which is essential for the Dark Realm and the finale.

The method is a systematic sweep with a checklist. On your first run, grab every jewel you naturally encounter, but do not stress about perfection. Then, in Ultimate Mode with maxed weapons, revisit each area and comb it corner by corner, using a location guide to confirm you have not missed any. The fixed camera hides jewels behind objects and in alcoves, so physically rotate your view and check every edge of each screen.

Because jewels are finite, prioritize them over almost any other pickup. A missed jewel is a permanently lower maximum, and there is no way to compensate later. Treat the jewel sweep as the backbone of your completion run.

The Bishamon Sword and 100% Completion

The final piece of the max-upgrade puzzle is the Bishamon Sword, earned by reaching the bottom of the Dark Realm. It is the strongest weapon in the game and the last item needed to consider Samanosuke's arsenal fully complete. Clear the Dark Realm with a maxed elemental weapon and a full item stock, play each wave patiently, and the sword is yours.

With the Bishamon Sword in hand, all three elemental weapons maxed, and every jewel collected, you have reached the game's full upgrade state. At this point, the story bosses and any remaining achievements become trivial, and you can confidently pursue S-rank stages, no-heal runs, and other challenge content.

For 100% completion in the remaster, combine this state with a full set of Fluorites. The jewels and weapons handle your power; the Fluorites handle the bonus content. Knock out the Dark Realm and the jewel sweep in Ultimate Mode, finish the Fluorite hunt with a checklist, and you have fully upgraded and fully completed Onimusha: Warlords.

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Frequently Asked Questions

Realistically no. Red souls are shared and limited, so aim to max one weapon and half-level a second on a first run. Use the Dark Realm and Ultimate Mode to finish the rest.

There is a fixed, limited number of each hidden in the world -- they do not respawn and cannot be farmed. Collecting all of them raises your health and magic to their maximum possible values.

The Dark Realm survival mini-game drops souls far faster than story farming. A few deep runs bank enough red souls to max your remaining weapons at the Oni shrines.