新たな手法による地域計画づくりに関する調査研究《 資源管理と漁家経営の改善に資するシステム開発 》
Study on fishery household management improvement based on interactive information system
業務名
委託者
担当者

漁場・水揚港選定支援による流通効率化システム（但馬地区）（15-940）
（水産庁）
阿部龍介，
（上田昌行）

This paper presents an introduction of the developed system by that fisherman share various information. This system ischaracterized by the application of data mining methods and the introduction of IC tags. The predict price of each port market
can help a fishing boat to select a port for landing. And a part of this information is provided for market brokers. A fishermanand market brokers can perform their activity efficiently using this system. And we researched the influence to which adding
products information to marine products gives a consumer using IC tag. In addition, we select the offshore trawl net fishery inTajima, Hyogo Prefecture as a model area.
Key Words: IC Tag, Distribution Efficiency, Interactive Information, Tajima

1. INTRODUCTION
In recent years, catch quantities is decreasing andTAJIMA

products price is low level. Then fisherman is called onto be active efficiently and rationality. But, neither about
Shibayama

fishery point selection nor landing port selection,
rational action is necessarily chosen. One of the causes

Tsuiyama

Takenohama

Hamasaka

Kasumi

Hyogo Prefectureof this is in the point that the information between
fishery cooperative associations is not common. In thisresearch, we take the offshore trawl net fishery in
Tajima as the model object, and developed the system

Figure 1. The position in the Tajima

that can select a fishery point and landing port rationality

by Informational sharing. Moreover, we provide market brokers with a part of these information, and attempted rationalizationand stabilization of products dealings. And, we investigated the influence on a consumer to adding product information togoods.

2. The outline of the fishery in TAJIMA
In this area, there are 5 fishery cooperative
Hamasakachou（Fig.1）.
In fishery production of the Tajima area, the catch
quantity and the product value are decreasing（Fig.2）.
The catch quantity is decreasing 31%, and the12,553

25,00012,056

12,474Value

11,42010,268

10,641 10,665

20,00010,062

9,692

10,00015,00026,464
23,41910,000Quantity

product value is decreasing 26% in these ten years.

20,946

22,627 22,81318,071

20,228 19,232

17,216 18,330

5,000

5,000

The quantity in 2002 is 18,330t and the value is9,692million yen.

1993 1994 1995 1996 1997 1998 1999 2000 2001 2002

The main fishery in Tajima is offshore trawl net

Figure 2. Transition of the fishery quantity offishery. The catch quantity of this accounts for 54.0%,

production in Tajima

and the value of this accounts 72.9% of the total

123―00Value (m illion yen)

Kasumichou,

13,180Q uantity (ton)Shibayamakou,

15,00030,000associations, which are Tsuiyamakou, Takenohama,新たな手法による地域計画づくりに関する調査研究（Fig.3）. But the number of the operation boats ofQuantity
Others19.5%

offshore trawl net fishery is decreasing sharply inrecent years, reduced by half during these 30 years.

Offshore trawl net
54.0%

The offshore trawl fishery is performed from

Coastal squid jigging
16.0%

September to May（Fig.4）. The fishing season ofOffshore squid jigging
5.1%

theSet net
2.7%

Round haul net
2.8%

snowcrabinMay.

Andthefishery, which is the prime fish of this fishery isValuefrom November 6 to March 20. During this period,

Others13.3%

Coastal squid jigging
8.3%

a snow crab is caught intensively, and at time other

Offshore squid jigging
2.1%

Offshore trawl net
72.9%

than this, flounder, sand fish, shrimp, firefly-squid
are caught.

Set net1.9%

Figure5 shows the transition for these thirty

Round haul net
1.5%

years of catch quantity and average-unit-price ofsnow crab in Tajama. About the catch quantity, it

Figure3. Percentage of catch quantity and value by every

decreased sharply from the middle of the 80s, but

fishery in TAJIMA

since the effect of control for resourcesmanagement, it was recovered from the middle ofJan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Snow-crabfishes

Malethe 90s. The tendency for an average unit price ishenin inverse relation to the products quantity. In thisMizugani ※figure,FlounderMale,Hen,MIZUGANI.

Fishery
prohibition period

Sand fish
Other fishes

OthersitclassifiedA

intoremarkable"MIZUGANI" is Male snow crab for less than one
year after terminal molt. The market valuation ofShrimp

MIZUGANI is low, because filling is not good.

Shellfish※MIZUGANI is Male Snow-Crab for less than one year after terminal molting

main catch fish

secondary catch fish

Figure 4. The operational schedule of offshore trawl fishery
14,0003,000

12,000

2,500

8,000
1,500
6,000
1,000

Unit price (yen/kg)

10,0002,000

Mizugani
henMaleunit price (Mizugani)unit price (Hen)unit price (Male)

4,000
500

2,000

00
1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003

Figure 5. Production quantity and unit-price of snow-crab in Tajima

124
―

has

differential is seen among these. In addition,

Firefly squidQuantity (ton)isremoval-of-the-ban season of the snow crab

新たな手法による地域計画づくりに関する調査研究

3. Interactive information system and functions
Figure6 shows the imageofthesystem.

Theinformation

reported

tofishery-coopfromeachfishing boat by radio or

fishing boat

TEL or radio

telephone is collected in theserver center. The PC set up
at each fishery cooperative

ADSL・・・・

FisheryCooperative ①

association is connected totheInternet,

andFisherman

Satellite telephone service for the ship
DOCOMO SENTSU

thisServerCenter

information can be seen
freely using PC. Moreover,fisherman or market brokersFishery
Cooperative ⑤Marketmerchant

in Tajima, can be seen a part
Figure 6 Interactive information System

of information using theInternet or a cellular phone.
Figure7 shows the four functions in this system.

Guidance for fishing place

Record fishing place information,and provide
fishermen with useful information.

Guidance forselecting landing port

Collect the reports of the expected arrival
information ,and provides fishermen and market
brokers with this information.

Market information

Provide the market price information andprediction price of main fish.

Adding productinformation

Program system for writing individual productinformation to IC Tag.
Figure 7 Four Function of system125―

新たな手法による地域計画づくりに関する調査研究

4. The method of data mining of a snow crab price(1) The method of data mining
Product price is one of the most important elements for which fisherman select a landing port. This system predicts the priceof snow crab, and provides it for fisherman. We introduce the method of price prediction simply. The price of snow crab isprescribed by various elements. For example, it is the size, quality, season, a day of the week, and the price movement for thepast several days.
We analyze the determinative mechanism of snow crab price, using the market selling data for the past three years, from2000year to 2002 year.

(2) The result of price analysis
The following analysis results were obtained from the tendency of the past price.
① Price transition was showed a different tendency among " Male", " Female", and "Mizugani ".
② The individual price in each brand was mostly determined by size.
③ The difference was found by the tendency of price transition between fishery cooperative associations.
④ A price is strongly influenced of seasonal.
⑤ The influence by the day of the week was seldom seen.
⑥ About the relation between the quantity of production and a price, the relation with the quantity of production of theaccumulation for the past several days was stronger than the quantity of production on the day.
⑦ The big gap appeared in the price level by the year.

(3) Procedure of predict price formula
Then, we compute predict price by the following methods, using the result, which analyzed the price of snow crab.
① We computed predict price about three brands respectively.
② We computed predict price for every fishery-coop.
③ The basic formula of predict price was computed by the seasonal tendency of price transition.
④ We rectified the predict price formula by the accumulative landing quantity for the past seven days.
⑤ We adjusted the price level gap in years, by the price transition of this year.
Figure8 is the formula of the predict price in the case of Shibayama market in Nov. The predict formula consists of three
influence parts. One is the seasonal price tendency, which is yellow part. The second is the adjustment by the accumulative
landing quantity for the past seven days, which is orange part. And the third is the adjustment by the price level gap in years,
which is green part. The adjustment by the price level gap in years computes accumulative predict price for 5days byaccumulative real price for 5deys.The predict price formula for every fishery cooperative association, and every month, is as
being shown in table1.The system provided fisherman with the predict price, as information for the judgment of landing port
selection.

{() + 337.1} × A

P = − 0.0571 × − 0.391Q 3 + 19.11Q 2 − 266.7Q + 4865
P : Predict price
Q : Landing quantity
A : Adjust index

A = (accumulative predict price ) / (accumulative real price )Figure 8 The formula of the predict price about snow crab (In the case of Shibayama market in Nov)
Table 1 Predict price formula of male snow crab

126―

新たな手法による地域計画づくりに関する調査研究

Fishery cooperativeassociation

Tsuiyamakou

Sibayamakou

Kasumichou

Hamasakachou

Adjustment by the accumulatequantity for the past seven daysMonthseasonal tendenncy

NOV
DEC
JAN
FEB
MAR
NOV
DEC
JAN
FEB
MAR
NOVDECJAN
FEBMARNOVDECJAN
FEB
MARy = -0.0466x3 + 9.6613x2 - 270.91x + 4997.4y = 0.0632x3 - 2.4263x2 + 103.78x + 3216.8
y = -0.5908x3 + 30.17x2 - 442.52x + 5819.5
y = 0.558x3 - 26.609x2 + 266.97x + 3804
y = -0.5152x3 + 4.726x2 + 76.789x + 2330.2
y = -0.3917x3 + 19.113x2 - 266.71x + 4865.2
y = -0.1801x3 + 4.0089x2 + 121.41x + 4380.2
y = -0.3407x3 + 23.661x2 - 436.13x + 7151.
y = 0.3104x3 - 11.38x2 - 1.9996x + 5362.5
y = -0.6499x3 + 11.136x2 + 23.018x + 2681.1
y = -0.3731x3 + 16.673x2 - 218.71x + 4614.9
y = -0.7266x3 + 31.209x2 - 252.9x + 4427.4
y = -0.3659x3 + 27.84x2 - 507.74x + 6029.6
y = 0.4867x3 - 19.903x2 + 184.46x + 4378.5
y = -1.4999x3 + 40.137x2 - 335.29x + 4660.4
y = 0.4288x3 - 18.565x2 + 242.54x + 3024.1
y = 0.0538x3 - 10.315x2 + 386.95x + 3306.5
y = -0.0839x3 + 18.496x2 - 527.86x + 7792.4
y = -0.4944x3 + 20.031x2 - 235.15x + 4551.7
y = -0.1863x3 - 5.8262x2 + 145.2x + 2738.7

y = -0.0527x + 418.72

y = -0.0573x + 337.18

y = -0.0158x + 37.957

y = -0.0352x - 101.87

5. Adding production information research(1) Research method
Finally, I explain the research method of theStore or Tourist house

Fishery
cooperative

Display products`informationinfluence that Adding product information toproducts has on a consumer（Fig.9）.
Fishery cooperative association staff records
product information in IC tag, by using expected

Fishery market

arrival information. And sale crabs with IC tag at
fishery market. At stores or tourist homes, we display

Questionnaire survey

information in IC tag to customers, and carries out aquestionnaire survey about IC tag. Then, we analyze
analysisquestionnaires.
Figure10 is machineries used for this experiment.

Figure 9 Adding product information

Considering about the characteristic of the use ofsnow crab, we selected the IC tag, which is excellent
in water resistance and heat resistance.

(2) Questionnaire result
Here, I introduce a part of consumer questionnaire
IC tagresult.

Information writer

Figure11 is the result of the question about
valuation for IC tag. Respondents who answer that IC

Notebook PC for display

tag is good for eating at ease accounted for about
80% of the total. On the other hand, the respondents
who answer it’s good for getting goods information

Figure 10 Machineries foror fisherman information was as low as 20% or less.

That is, the consumer expects sense of security rather than actual information for IC tag. That is, a consumer can say that heis asking IC tag for sense of security from concrete goods information.

127―新たな手法による地域計画づくりに関する調査研究

That is, the consumer expects
Figure12 is the result of thesecurity rather to IC tag from concrete goods information.
Valuation for IC tag(%)
question, what consumer requesttag. The respondentwhorequests
0 for IC 20406080for the information of catch place is relatively high, about①60%of thetotal.atBut
It's goodfor eatingease. responded who requests for catch day, catch② It's good for getting goods information.
fisherman, landing port, and quality is each only 30〜40%.
③ It's good for getting fisherman's information.

get judgement
purchase.
It cannot be overemphasized that the opinion ④ofWeacanconsumer
isforvery
important information, when we aim for the⑤ Necessity is not felt.

improvement of product price. The system also has the function to offer
the consumers information to fisherman and fishery⑥ No answer
cooperative association.
Figure11. Questionnaire result about valuation IC tag

6. Conclusion

The information system developed with this investigation enterprise was already completed as a system. But it is not a stage
What kind of information,do you want for IC tag ?

that measures a project effect quantitatively, since the system was just introduced. 0(%)

2040

6080

Therefore, it changes into a conclusion; I describe the synthetic working① Dayimageof catchof this system（Fig.13）.
② Place of catch

A plenty of information was common by introducing this system.
Sharing③ Manof catchinformation rationalizes fishery action, and④ Landing port
contributes to the stabilization of fishery management. The system gives
consumers goods information, and they can choose⑤ Quality of fish

⑥ Information
about association
circulation process
safety food. Furthermore, the office worker in fisherycooperative
can work efficiently by using this system, and⑦ The others

stabilization of the management is realized.
But now, the situation that fishery action changed
sharply
by using a system
not beenborn. However,theformergerofFigure12.
Questionnaire
resulthas
about
information
requested
IC tagfishery cooperative association is discussed in the Tajima area now, and when this is realized, various effect is expected.
On the situation, which a fishery reduces, the fishery management must be rationalizing. For that purpose, it is thought thatsharing information is the most effective step.

Introduction of the system

Informational sharing

Mitigation of office workRationalizationof fishery action

sending Information
to consumers(Fisherman)
management stability(consumer)
Safety food(Fishery cooperative association)
management stability

Figure13 The synthetic working image of the system

128―