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ProtoMan with Muramasa in the Rockman.EXE Card Game.

Muramasa (ムラマサ) is a dark sword from the Mega Man Battle Network and Mega Man Star Force series based on Muramasa that mainly appears as a Battle Chip or Battle Card.

Battle Chips


Muramasa (ムラマサ) is a sword used by ShadowMan that can be obtained from him as a Battle Chip. It slashes one square ahead. The damage it causes increases as the user's HP lowers. ShadowMan himself is also capable of using this attack while low on health, which can be lethal as it could do upwards of 1000 damage in one hit.

Mega Man Battle Network

IDBattle ChipDescriptionAttackElement CodeRarity
22MuramasaBNMuramasa Do damage = to your HP loss BC Element Null None C,E,G,J,K*****

Mega Man Battle Network 2

IDBattle ChipDescriptionAttackElement CodeCapacityRarity
37MuramasaBNMuramasa Sword that uses HPs to attack????BC Element Null None N,O,T,U,W,*88 MB*****

Mega Man Network Transmission

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IDBattle Chip

Mega Man Battle Chip Challenge

IDBattle ChipHPAPMBElement Acc Attack Description Rarity
37 MuramasaBN Muramasa 601070None ERandom+?
(Rnd???+ Bchip Add Atk)
HP Into Atk Pwr****

Although it cannot be obtained in Mega Man Battle Network 5, Muramasa appears alongside ShadowMan in the Team Colonel version.

Muramasa Blade

The Muramasa Blade (ムラマサブレード Muramasa Burēdo), shortened as Muramasa outside Japan, is a slightly different version of the Muramasa Battle Chip. It cuts two squares ahead. Its attack power is the difference of the user's current HP and maximum HP, but caps off at 999 and 500 from the fourth and sixth game onwards respectively.

Mega Man Battle Network 3

IDBattle ChipDescriptionAttack ElementCodeMBRarity
Mega Chip 1 MMBN3MChip01 Muramasa Power = amount of HP lost!????BC Element Null None M74 MB*****

Mega Man Battle Network 4

IDBattle ChipDescriptionAttackElementCodeMBRarity
Mega Chip 14
Muramasa EvilChip! Power = HP lost ????BC Attribute Sword Sword M81 MB*****

Mega Man Battle Network 5

IDBattle ChipDescriptionAttackElementCodeMBRarity
Mega Chip 14
Muramasa Atk power equal amt of lostHP ????BC Attribute Sword Sword M81 MB*****

Mega Man Battle Network 6

IDBattle ChipDescriptionAttackElementCodeMBRarity
Standard Chip 84
Muramasa Atk power equal amt of lostHP???BC Attribute Sword Sword M77 MB****

Rockman.EXE 4.5 Real Operation

ID Battle Chip Description translationAttack
Mega Class Chip 14 BN45MChip014 Muramasa Blade Cuts horizontally 2 squares! Decreased HP becomes attack power ???BC Attribute Sword Sword 81 MB*****

Battle Card

Muramasa (Muramasa Blade in Japan) is a Standard Battle Card in Mega Man Star Force 2 and Mega Man Star Force 3. It cannot be obtained normally in either game. In Mega Man Star Force 2, it can only be obtained by entering a Wave Command Code for a Blank Card, while in Mega Man Star Force 3 it appears only as Illegal Data.

Much like its Battle Chip predecessor, Muramasa deals damage equal to the amount of HP the user has lost. Its damage is capped at 500 and it hits 2 panels deep.

IDBattle CardDescriptionAttackElement
Mega Man Star Force 2
(Standard Card)
Muramasa Muramasa Sword Atk is as strong as you are weak - BC Element Null None
Mega Man Star Force 3
Illegal Card
(Standard Card)
MuramasaMuramasa Sword Atk is as strong as you are weak ???BC Element Null None
BC Attribute Sword Sword

Other media

Rockman.EXE Stream

Muramasa Blade is used by ShadowMan.

MegaMan NT Warrior (manga)

Muramasa (Muramasa Blade in Japan) appeared in the MegaMan NT Warrior manga as a blade forged to combat the Dark Power. Serenade gave it to ProtoMan so he could destroy the Dark Power. This super-natural sword carries the burden of the wearer having to fight against the Dark Power until the end, not stopping even if he is heavily injured or feeling pain. However, the more damage the user sustains, the higher its power will be. ProtoMan also gains the Muramasa Style Change with it.

ProtoMan used Muramasa to defeat the Forces of Darkness and LaserMan. In the final chapter, he asks a swordsmith to reforge Muramasa, giving its blade the ability to split into three.


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