The Japanese Congress of Neurological Surgeons is a society whose purpose is to contribute to the health and welfare of the nation through the advancement of neurosurgery through lifelong education of neurosurgeons and scientific research.

JCOG (Japan Clinical Oncology Group) is a collaborative research group centered on the National Cancer Center Research and Development Fund (formerly the Cancer Research Grant) research team. We are conducting various research activities (multi-center collaborative clinical trials) with the aim of establishing and advancing standard treatment for cancer.

J.カレッジ offers music education including piano lessons, vocal training, dance classes, musical theater, and English lessons.

J International Academy, a Japanese language school in Osaka, is a Japanese language school that attracts many international students. It boasts one of the largest student populations in the Kansai region and offers a variety of Japanese language courses.

J:COM official website. J:COM makes your life more fun and convenient with a wide range of services, including cable TV (CS, BS, terrestrial digital), internet, low-cost smartphones, telephone, electricity, and more.

If you are looking to buy real estate in Sapporo, leave it to J Company!

J Contact is an official site for contact lens sales stores located near Shinjuku and Ikebukuro stations, offering a wide variety of products and sufficient stock.

The Society was dissolved in July 2024.

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