Ni-natsu (Two Summers)

Ni-natsu refers to miso aging through two summers. Miso prepared in winter sees active microbial work in the first summer, calms in the next winter, then ferments again in the second summer. Maillard reactions also progress, deepening color and concentrating umami. Hatcho miso standards call for two summers and two winters for this reason. Even with identical ingredients and methods, duration decisively changes flavor. The word ni-natsu succinctly expresses the power of time in fermentation. Comparing miso after one summer and two summers clearly demonstrates time's effect on flavor. The deep color and umami of two-summer miso teaches the value of patience.