Organic cultivation is a method of growing plants (grains, vegetables, fruit, etc.) without using agricultural chemicals.

Around 1940, Yoshimoto and his mentor Teishin KOMATANI started to reform Mishirabe by eliminating its secrecy and penance into Naikan, a method of mind cultivation for everyone.

Later, this method succeeded because of the availability of material supply and transport, closeness of the field as a reference, the establishment of selection methods, and the formularization of cultivation of immature trees.

Cultivation method

Generally speaking, the cultivation methods of wasabi are categorized into mizuwasabi (water-grown wasabi) (sawa wasabi), which is cultivated in water, and hatawasabi (farm-grown wasabi) (rikuwasabi), which is cultivated in the field.

The method of cultivation

In terms of its manufacturing method, gyokuro is classified as a kind of sencha (green tea), but its cultivation process is characteristic.

This kind of cultivation method for gyokuro tea leaves is the same as for tencha (powdered green tea), and reportedly it was already practiced during the Azuchi-Momoyama period.

The manufacturing method is almost the same as that of sencha (green tea of middle grade), but its ingredients include tea leaves harvested after the summer (sanbancha [third picked tea leaves], yobancha [fourth picked tea leaves]), tea leaves gathered when branch is shaped for next cultivation (shutobancha [tea leaves picked in autumn and winter]), large leaves (senryu) removed during the sencha manufacturing process.

As a result, specialist manufacturers called wineries became serious about winemaking, and introduced cultivation method emulating European hedging styles, and began to develop specially cultivated insect resistant grape varieties from European strains.

"Cultivated Plants and the Origin of Agriculture" (1966) written by Sasuke NAKAO described that this method was one of cultural complexes of swidden cultivation of 'hill folks in Laos and tribe doing swidden agriculture in Borneo Island.'

Depending on the variety and the cultivation method, its leaf and stem are soft and have pungent taste.

In the field of fishery, the advanced fishing method which had developed along the shore of the Inland Sea and Kumano spread across Japan, and the cultivation of salt fields in which brine is brought through tidal action along the coast of the Inland Sea improved the mass production of salt, which developed the nationalwide distribution system of salt.

He had botanical knowledge, and according to legend when he was 103 years old he engaged in the improvement of grape cultivation (using an overhead trellis method for the vines) (source: 'Koshu')

There is a document saying that before Kyoho period, the cultivation method of sweet potatoes was also brought to Kanto by way of Shimousa Province Choshi City.

Nobuhiro SATO criticized that Konyo's sweet potato cultivation method was a 'Careless method' in his book "Six-step method in cultivating plants"and introduced high temperature and humidity seedlings as a harvest method at early time, in contrast to Konyo's method of planting the seed tuber directly on ground.

This cultivation method, which was the method of practice until recently in various parts of Kanto, was recorded in many of the farm books in the Kanto region during the late recent period.

Moreover, in "Theory of sweet potato," the story of a sweet potato ronin in the next village Takeishi-son Village of Makuhari (present Hanamigawa-ku Ward, Chiba City) was mentioned as the person who spread the cultivation method of sweet potatos.