Refined Defence for the Tomioka clan in Demon Born appears to be a clan bonus tied to the Tomioka family, and the Tomioka clan itself is listed as giving +20 Health, +22 Stamina, and +1 Strength in a current Demon Born clan guide.

What it means

The wording “refined defense” is not clearly explained in the sources I found, but it most likely refers to a defensive perk or defensive-style clan trait associated with Tomioka.

Tomioka context

In related Demon Slayer-inspired Roblox games, Tomioka is usually treated as a strong starter clan with water-themed benefits or a special defensive move, which matches the idea that it is meant to help survivability early on.

Practical takeaway

If you rolled Tomioka in Demon Born , the safe assumption is that it is a good all-around clan with a defense-leaning identity rather than a pure damage clan.

Quick Scoop

Tomioka in Demon Born is a defensive-leaning clan with solid stat boosts, and “refined defense” likely points to that survivability-focused role.