For basic weapons, weapon strength and rune slots are generally
inversely proportional to each other except for Kabura Sutegi.
Stronger than a Katana with resonance, but still too weak to continue
using it mid~late game.

Pretty weak, but easy to find both weapon and shield for resonance.
Often found on 1-5F alongside Wooden Shield in dungeons that don't
expect the player to rely on equipment.

Common, and same strength as Doutanuki with resonance.
That said, there are still plenty of stronger weapons out there.

Decent base strength, but few rune slots.
Still a decent bit weaker than a Manji Kabura even with resonance.
Mostly used as an interim weapon while waiting for a sacred weapon.
However, it shines in dungeons where Mixers don't appear.

Stronger than any of the lower tier basic weapons, but few rune slots.
Viable if you find a sacred version and/or use Slot-adding Scrolls.
Resonance adds fixed damage to normal attacks, making it easier
to fight monsters like Ghost Samurai and Cave Mamel.

Flame Shot cannot be erased by a Blacksmith on Kajin Fuuma.
Monsters have higher HP in this game, so 10 damage is a bit mediocre.
Can be combined with Onigiri Payback to obtain Grilled Onigiri,
and effective against Ghost Samurai, Cave Mamel, and Gitan Mamel.
How to obtain: Upgrade a Katana+99 in Shukuba Beach.

Strongest sword in the game in terms of base strength and rune slots.
Resonance with Rasen Fuuma lets you slay Gitan Mamel in 2 hits.
This set's rival for carry-in dungeons is the Yamanba's set or Steak set.
How to obtain: Upgrade a Manji Kabura+99 in Shukuba Beach.

Low base strength, but fantastic in terms of rune slots.
Increases accuracy of normal attacks by 2.0% (92% → 94%).
Resonance effect's chance seems to be roughly 24%.
Gitan dropped due to resonance does not overwrite other item drops.

Essential as a rune, but too weak to use as a main weapon.
However, a sacred version with a high modifier can be viable.

Roughly 30% chance to land a x1.5 damage critical hit.
Resonance boosts critical hit rates:
   Player: 30% → 40% chance, Monster: 33% chance.
Pairs nicely with Targe of the Minotaur + Daredevil Bracelet x 2.
How to obtain: Occasionally dropped by Taur family monsters.

Duplicate it using a Bouncy Wall Room before synthesizing it.
Blue sacred version is only possible to obtain in Isle of the Mighty.
How to obtain: Clear Heart of Serpentcoil Island 6 times,
or Isle of the Mighty (Shop, 98~99F).

25% chance to activate, second hit has 50% attack power.
Plays well with chance based runes (Critical, Sedating, etc.)

Deals x1.5 damage to Aquatic type monsters.
Resonance boosts Anti-Aquatic's damage multiplier (x1.5 → x2.5).
Passable rune slot count, nice for hunting Thiefwalrus monsters.

Deals x1.5 damage to Beast type monsters.
High rune slot count, good main weapon even as non-sacred.

Deals x1.5 damage to Dragon type monsters.
Resonance boosts Anti-Dragon's damage multiplier (x1.5 → x2.5).
Highest base strength among type-effective weapons.

Deals x1.5 damage to Exploding type monsters.
Resonance boosts Anti-Exploding's damage multiplier (x1.5 → x2.5).
Anti-Exploding is lackluster, so it's not a good main weapon option.

Deals x1.5 damage to Floating type monsters.
Mainly useful against Pumphantasm and Death Reaper monsters.
However, base strength and rune slot count are both kind of bad.

Deals x1.5 damage to Ghost type monsters.
Use it to one-shot Ghost Samurai with a normal attack.
Great main weapon - Base strength is a bit low, but lots of rune slots.

Deals x1.5 damage to Draining type monsters.
Great as a rune, but too few rune slots to be used as a main weapon.

Deals x1.5 damage to Cyclops type monsters.
Resonance boosts Anti-Cyclops's damage multiplier (x1.5 → x2.5).
Solid rune, decent base strength, but low rune slot count.
Watchful Shield only has 1 defense, so its resonance isn't very practical.

Deals x1.5 damage to Metal type monsters.
Nice for Karakuroid monsters even if you eradicate Pop Tanks.
Pretty average as a main weapon for both base strength and rune slots.

Roughly 53.7% chance to deal 1 tile of knockback.
Resonance's chance to inflict Laughing status is roughly 10.4%.

Restores HP equal to 10% of damage dealt.

30% chance for an enemy to drop a Peach Bun when defeated.

Normal attacks deal x1.5 damage, but spend 100 Gitan per hit.
Weapon attack becomes 0 without enough Gitan.
Resonance reduces Gitan cost per hit from 100 → 75.

Normal attacks deal x1.5 damage, but spend 2 Fullness per hit.
Resonance reduces Fullness loss per hit (2 → 1).

Normal attacks deal x2.0 damage while you have Starving status.
HP still doesn't regenerate while you have Starving status.

No additional notes.

No additional notes.

Critical hits deal x1.5 damage.
Resonance's chance to negate trap activation is roughly 70%.

Roughly 50% chance for Upgrade Value to decrease.
The weapon itself won't break from digging.

Confirmed Location: Isle of the Mighty - Shop 49F

Roughly 50% chance for Upgrade Value to decrease.
The weapon itself won't break from breaking traps or items.

Confirmed Location: Isle of the Mighty - Shop 49F

No additional notes.

Resonance's chance to inflict Onigiri status is roughly 10.5%.

Despite the in-game description, it's not always found cursed.

Resonance's chance to activate hasn't been tested yet.