YAMAMOTO CO., LTD.

Grain property

There is a fact that the quality and recovery of white rice differs even items which can be shown in numerical value, such as volumetric weight, and percentage of whole grain are same. This is caused by the factors defined by the quality evaluation which can not be shown in numerical value. Therefore, the original standard grain and samples are given for evaluating the quality.

The grain property consists of eight (8) elements. In the Figure-1, skin abraded grain whose difference of appearance is obvious is shown.

Thickness of pericarp
A grain with thin pericarp is well-matured, and has lively and lustrous appearance, and has high recovery of
white rice. Some of the varieties have thick pericarp, and immature grain has generally the deep vertical
furrow on the surface as well as thick pericarp. They are inferior in luster and recovery of white rice.

2) Maturity degree
Maturity degree shows the degree in grain maturity. A grain which has large volumetric weight has high
maturity degree. And a grain which has high maturity degree and percentage of whole grain has high
recovery of white rice. In the same variety, grain with high maturity degree has a tendency to have good
taste.