Quality Control

Quality Assurance System to produce reliable products

We have a total commitment to the maintenance of constantly up to date and state of the art quality control systems.

In order to guarantee the quality and safety of all products, We maintains a strict quality assurance system. Our tea masters examine teas for color and aroma…etc. Our Quality Assurance Department conduct micro biological and physicochemical testing using various facilities and technologies to confirm products’ quality by numerical values.

Testing Processes

To provide reliable products to our customers, strict testing and analyses are conducted with the following processes.

Pesticide Residue Analysis

The pesticide residue analysis are conducted using GC-MS (Gas chromatography-mass spectrometry) for 267 kinds of pesticides which are commonly used at Japanese tea gardens and coffee plantations.

Micro Biological Testing

Aerobic plate count and coliforms analyses are conducted during inspection for both raw materials and finished products. For dry mix products, the standard sets “Aerobic plate count: less than 3000/g” and “Coliforms: Negative”. Every dry mix product produced in our factory go through an inspection conducted by our QA Department.

Component Analysis

Tea contains various components, such as Catechin, Caffeine, Theanine...etc. Since these components have an effect on the taste of tea, component analyses results help to predict the amount of Umami, bitterness and astringency in tea. Checking particle size, color and moisture are also useful to determine the quality of Matcha or other products.

Testing Analyses provided at in-house laboratory

Micro Biological Testing Coliforms / Aerobic plate count / Yeast and mold
Physicochemical Analyses Pesticide residue (Gas chromatography-mass spectrometry)
Particle size (Particle size analyzer)
Caffeine / Amino acid / V.C. / Catechin(Capillary electrophoresis)
Additive Ion(Capillary electrophoresis)
Tannin / Polyphenol / Sugar content(Visible Spectrophotometer)
Moisture (Moisture analyzer)
Color (Color meter)
Radiation dosage (Radioactivity analyzer)