Investigation of Quality Enhancement Mechanisms in Tenobe Somen Noodles During Storage and Maturation

Tenobe somen (hand-stretched) noodles are distinguished by their exceptional quality, which is achieved through a unique production method and a characteristic long-term aging process. This aging is closely associated with the oiling and “yaku” procedures. “Yaku” refers to the process of storing dried tenobe somen noodles in a warehouse during the high-temperature and high-humidity rainy season (typically in summer) for a period of time. This process is not merely about storage; rather, it involves complex physicochemical changes in the internal components of the noodles triggered by environmental factors, ultimately endowing the noodles with superior quality. This review systematically examines the critical factors influencing tenobe somen production, including oil selection for anti-adhesion treatment, the evolution of fundamental physicochemical properties, cooking performance, and sensory quality during storage. Particular emphasis is placed on the transformations of lipids, proteins, and starch components, as well as their intermolecular interactions. Recent findings demonstrate that cottonseed oil is especially effective in preventing strand adhesion during processing and contributes substantially to quality enhancement throughout storage. The optimization of noodle quality during aging is largely driven by chemical composition changes and synergistic molecular interactions. Overall, this review provides a comprehensive analysis of the multidimensional mechanisms underlying quality improvement in tenobe somen noodles. The insights gained offer valuable theoretical support for optimizing lipid selection, regulating storage protocols, and promoting the modernization of traditional pasta production technologies.