Smart Agriculture to Nourish Japan’s Future---The f-seed.Lab experimental farm initiative--The city of Sukagawa in central Fukushima Prefecture is located in a long east-west
region with splendid views of nature stretching all the way from the Nasu Mountain
Range in the west to Abukuma Highland in the east. In the Edo period (1603–1868) thecity flourished as a staging-post town on the Oshu Kaido, one of the five major highways
at that time, and it has prospered as a commercial town for ages. Lots of delicious fruitand vegetables, such as apples, pears, and tomatoes, are grown in Sukagawa. Year afteryear, however, the environment surrounding the city’s agricultural industry has become
increasingly severe due to such factors as the aging of farmers and shortage of successors.
Until recently Sukagawa boasted Japan’s highest production of cucumbers harvested in
the summer and fall, but now that title has been taken over by the city of Date (also in
Fukushima Prefecture).
Moves are beginning to break out of these doldrums and increase the farming
population through the utilization of productivity-improving information technology androbots. In this article, I introduce the efforts of the Fukushima Seed Center, which, incooperation with a couple of IT ventures, aims to reduce the amount of labor required incucumber cultivation and make farming more attractive.

Cucumber cultivation inside the f-seed.Lab greenhouse

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Turning farming into attractive work by utilizing IT and robots
In early October, when the harvesting of summer-fall cucumbers was just about over, I
visited the f-seed.Lab experimental farm, which the Fukushima Seed Center launchedin March of this year in cooperation with Benefic Co., Ltd., an IT firm, and MK Tech Co.,
Ltd., a manufacturer of robots. Here an experiment is taking place to improve laborsaving and quality in the growing of Iwase brand cucumbers.
When I entered the greenhouse built on farmland in the Yoshimine district inSukagawa, I saw a rather dandyish gentleman sporting a beard scrutinizing a line graphon a computer screen. This was Katsuyoshi Hashimoto, the president of the Fukushima
Seed Center, who explained, “This data shows the temperature, humidity, amount ofcarbon dioxide, and so on inside the greenhouse. What I am doing now is monitoring thisdata.”

Katsuyoshi Hashimoto scrutinizes data shown on a computer screen.
Unwittingly becoming an agricultural expert
Before his current position, Hashimoto worked in sales for a large food processing
company. When his father, the founder of the Fukushima Seed Center, retired, he decided
to take over the family business. The Fukushima Seed Center not only handles seeds but
also sells agricultural equipment and materials and greenhouses. In addition, it is anIHCSA Café

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agricultural consulting company, offering advice and guidance to consultations fromfarmers.
At first, Hashimoto told me, he did not understand anything at all, but he pickedup various know-how about agriculture from clients. Before realizing it, about 20 years
after taking over the business, he is now working busily every day as an agriculturalexpert.
Desire to change the image of agriculture“Over the last decade,” Hashimoto said, “the volume of agricultural production in
Sukagawa has been declining year by year. The reason is that there are few successors
to carry on farming businesses. When the number of farms drops, agriculture-relatedtrade declines too. As a result, the regional economy, which relies on agriculture, becomesstagnant and falls into a negative spiral. It’s the same all over Japan, isn’t it?”
The reason for the lack of successors is that farming is perceived to be hard, dirty,unprofitable, and unstable work. Hashimoto wants to change this perception, andincrease the number of successors, by popularizing the image of agriculture as creative
work; work that is not hard either physically or mentally; work that is stable and willnever disappear; work that, depending on your approach, can be quite profitable; workthat promotes mental well-being, because you are working with plants and nature; workthat brings direct words of thanks and delight; and work that is going to be increasingly
important in the future.

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Hashimoto checks that the cucumbers are growing properly.
Utilization of the Iwase brand of cucumbers
The Iwase district of Sukagawa is famous as a major production area of summer-fallcucumbers. From 1971 to 2013, it boasted the leading production volume in Japan. There
are various reasons why production has declined, but the most important one is the dropin the number of farms and people engaged in agriculture. In addition, the false rumorsthat spread after the accident at the Fukushima Daiichi nuclear power plant of Tokyo
Electric Power Co. following the Great East Japan Earthquake and subsequent tsunami
has had a heavy impact too.
Hashimoto decided to place his bet on Iwase cucumbers, which are already wellknown nationwide as a brand product, as a means of winning back the title of Japan’s
top producing area and revitalizing the regional agricultural industry and economy.
Iwase cucumbers are popular for their deep green color, softness, and juiciness.
Hashimoto wanted to capitalize on this local gem.

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Iwase brand cucumbers

Freshly harvested cucumbers waiting to be shipped

Aiming for agriculture that anyone can do
In May,2020 the f-seed.Lab project team planted 2,000 cucumber seedlings inside thegreenhouse. There are two ways of growing cucumbers. Instead of the bush-thinning
method,1 they opted for the vine-removal method.2 While the bush-thinning method
requires farmers to use all their five senses and skills to adjust vines and leaves, pay
attention to humidity, and so on, the vine-removal method requires almost no such
master skills. Since all they have to do is cut side-shoots and pluck some leaves inaccordance with guidelines, even beginners can manage without worry. In addition, toremove as many uncertain factors in cultivation as possible, Hashimoto’s team does notuse ground soil but employs an isolated-bed-type hydroponic cultivation3 technique.
In the bush-thinning method, chemical spraying consumes a lot of chemical and a
lot of time, because the leaves are so crowded together. But in the vine-removal method,since the leaves are distributed evenly, little chemical or time is required. And thechemical spraying is done by an Auto Runner unmanned pest-control sprayer, so there
is no worry about being exposed to pesticide either.
1. Bush-thinning method: The main stem of the cucumber is cut when it reaches about
60 cm, and many side-shoots spring from the main stem and secondary side-shoots fromthem. Fruit is harvested from the side-shoots.
2. Vine-removal method: The main stem of the cucumber is cut when it reaches about 60cm, and about four side-shoots springing from the main stem are grown. Fruit isharvested from these branches.
3. Isolated-bed-type hydroponic cultivation: The crop is grown away from the ground,
without using soil, by means of a nutrient solution produced by dissolving fertilizer inwater. This method prevents soil and repeated cultivation damage.

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Left: Isolated-bed-type hydroponic cultivation
Right: Auto Runner unmanned pest-control sprayer
Encouraging young people to take up farm work through smart agriculture
As a result of the recent progress of technology, people’s lives and work are evolving
dazzlingly by the day. Much work is approaching a turning point, with jobs that werepreviously done manually now being carried out by artificial intelligence and robots.
Hashimoto argues that agriculture must jump on this bandwagon too.
The red line on the graph displayed on the computer screen shows the temperatureinside the greenhouse. The blue line shows the humidity, the green line shows carbon
dioxide, and the other blue line shows the saturation defict,4 which indicates whether
photosynthesis is taking place efficiently. The ideal greenhouse environment for growing
cucumbers is a temperature of 25℃, a humidity of 75%, and a saturation deficit of 3–6
g/m3.

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Data on the environment inside the greenhouse is shown on a monitor.
Using this environment-control system, the project team manipulates thegreenhouse climate to get as near to the optimum figures as possible. If it rains, thesensors operate according to the set rainfall and open and close the roof automatically.
If the wind speed rises to 7 m/s or more, the windows can be set to close automatically.
In addition, the important process of watering is done by an automatic watering device,and fertilizer management is carried out by the Dosatron (French-made) pump, whichlinks with a pipe carrying water and supplies fertilizer automatically. If these systemsof watering and fertilizer management are used, almost no elbow grease is required.
Remote control is possible, so theoretically, as long as you have a computer, youcould do the work from overseas as well. “Workation” (a combination of “work” and“vacation”), which has been attracting a lot of attention of late as a new workstyle option,is possible too.
At present harvesting is done by temporary workers, but, in cooperation with MK
Tech, the project team is currently developing a robot that can automatically sort andharvest the cucumbers using image recognition technology. Hashimoto hopes thatthrough the introduction of IT, agriculture will take on a smart image, and more young

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people will find employment in this field.
4. Saturation deficit: This is an indicator of how much more water vapor can be released
into the air at a certain temperature and humidity. It shows the available capacity forwater vapor (g) per one m3 of air (g/m3).

Left: The windows can be opened and closed by remote control too.
Right: Dosatron fertilizer-supplying machine
Regional vitalization through agriculture
This pioneering initiative has been reported on television and in newspapers, andHashimoto has been invited to talk on the subject of “agriculture as a job” at junior highschools in Sukagawa. Apparently the project also has attracted attention among
companies in other industries, which have come to inspect it with the idea of adding thisfield as one of their businesses. They have a variety of reasons. One maker, for example,
said that it wanted to use this business as one means of employment for employees aged
over 60, and the owner of a retail business was thinking of agriculture as one line ofdiversified management, because sales had fallen. Undoubtedly agriculture is an
important industry that, whatever the age, is never going to disappear.

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Left: Mr. Hashimoto talks about his ambitions for the future.
Right: Mr. Hashimoto is thinking of using this house in front of the greenhouse
as a lodging for visitors.
Finally, I asked Hashimoto about his future ambitions. “At present,” he replied,“the greenhouse covers 1,300 m2, but over the next five years I plan to expand the area
to 10,000 m2. In front of the greenhouse there is a house that staff use for their breaks.
In the future, I am thinking of turning this house into a lodging for tourists, including
travelers coming from overseas. I think increasing people-to-people exchange isimportant for regional vitalization. This work is a joy, so I intend to continue until I am
80 or even until the day I die. After all, agriculture is my true calling!”

Fukushima Seed Center
http://f-seed.co.jp/ (Japanese site only)

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