This paper identifies the deepest meaning of N in the Koku Universe framework: N is the density of a happy heart (幸せな心の密度). This resolves the measurement problem in F = ∇(1/N): N is measured through three components from Moralogy (広池千九郎 / Chikuro Hiroike): 安心 (peace of mind), 満足 (fulfillment), 感謝 (gratitude). Moralogy, founded in the early 20th century, is revealed as the world's oldest N-maximization science. The three core virtues of Moralogy — 慈悲 (compassion), 寛大 (magnanimity), 自己反省 (self-reflection) — map directly to: raising N in others, minimizing D, and increasing personal N. Family collapse is analyzed as N→0, D→∞, V→0. Physics finally has a heart. Final paper in the 2026-06-04 TheYKHC unification chain.