1880 Late Mokujiro Tanaka(1862-1927) moved from Osaka, where his family had been engaged in crude drag wholesale business, to Tokyo to stat his carrier as an apprentice at a dealer of medical instruments and chemicals.
1892 Mokujiro Tanaka started his private business, thus the foundation of Tanaka Scientific.
1901 Tanaka and Associates Company was formed.
1907 The first Japan made microscope with 600-power was mass produced by Tanaka. This event helped the nation approach the dawn of the industrialization, in particular the silk industry which later became the largest exporting industry.

The first Japan made microscope with 600-power

1920 Tokyo Scientific Machinery Union was founded, and Mokujiro Tanaka was appointed the President.
1923 Tanaka headquarters building and factory in downtown Tokyo was devastated by Great Kanto Earthquake.

Devastated by Great Kanto Earthquake

The headquarters was relocated to Aoyama ward, and soon after the company recovered quickly due to the rapid industrialization of the nation. Customers included universities, research laboratories, militaries and testing laboratories, and Tanaka gained much of the market shares in the cosmopolitan area.

Relocated to Aoyama ward


1928 Due to strain from series of challenges, Mokujiro Tanaka passed away at the age of 67. His son, Yotaro Tanaka, took over the company while attending university.
1940 The company strengthened the manufacturing capacity and reorganized. Renamed to the current corporate name: Tanaka Scientific Limited.
1945 The headquarters was devastated by the heavy bombing in March. Japan surrenders to the Allies in August, and Tanaka temporarily aborted its business.
1950s Due to the recovery of Japan's industries, demand for scientific instruments including petroleum testers gradually increased. Tanaka participated in the start up of several new refineries, including Idemitsu Tokuyama refinery in 1957. Tanaka's business gradually improved.

Idemitsu Tokuyama Refinery completed in 1957.
View video of Tokuyama Refinery


1965 Due to the rapid economic growth, requirement of automating petroleum tests had increased quickly. Tanaka Scientific started developing automated petroleum testers to add to the traditional manual testers.

First automated flash point tester,
model APM-Ⅰ (1966)

1968 Tanaka was appointed a voting member for Petroleum Testing Subcommittee of Japan Industrial Standard. Ever since then, we have been positively involved in the making and maintenance of this national standard.
1976 The first CPU embedded flash point tester, model APM-4, was released. Ever since then, majority of heavily executed tests have been automated by CPU technology for higher productivity as well as superior precision.

First CPU embedded flash point tester,
model APM-4 (1976)

1980s Tanaka's CPU embedded petroleum testers made debut in overseas. Since the product reliability had improved significantly, automated petroleum testers became suitable for export.
1982 Started supplying the automated flash point testers to a US manufacturer on OEM basis. In order to better serve the US customers, decision was made to participate in the ASTM standard making/maintenance processes. Application for Voting Membership for "Committee D2 on Petroleum Products and Lubricants" was accepted, and ever since this year, Tanaka has been positively involved in the various activities at ASTM.


1989 Due to increased precision requirement for sulfur-in-oil determination, X-ray fluorescence sulfur meters, namely RX series, have been added to the line of products.
1995 Shanghai Tanaka Scientific Limited was formed in Shanghai, China, to supply the line of petroleum testers in China.
1997 One of the most significant ASTM test methods, D86 on Standard Test Method for Atmospheric Distillation, was completely rewritten with the latest findings. Tanaka Scientific took a significant role in this project, and "Award of Excellence" was granted for the contribution.
2001 The company celebrated its 100th year anniversary.
2002 Tanaka's automatic pour point test method was adopted by ASTM as "D6749 Standard Test Method for Pour Point of Petroleum Products (Automatic Air Pressure Method)".
2007 New office building was completed in Adachi ward in downtown Tokyo.

New office building was completed

2011 Eastern Japan was hit by the 2011 Tohoku Earthquake and Tsunami on March 11th and the subsequent Fukushima nuclear power plant accident. The new office building had no damages; however, one of the subcontractors in Fukushima prefecture was affected by the nuclear power plant accident. A quick decision was made to host the subcontractor in a conference room at Tanaka office building, and on March 28 which is just two weeks after the accident, assembly process resumed. The theme for Tanaka's recovery project was entitled "Ganbaroh Japan- Together We Recover" in April, and ever since then continuing effort to help the victims' recovery have been made across Tanaka group.
2015 Mission Statement” was revised, and “Brand Statement” was established.


2020 The mpc-6 of MPC series pour/cloud point testers was awarded the ‘2020 Global Niche Top 100’ by Japan’s Ministry of Economy, Trade and Industry.
Flash Point Testers

A tester that automates the flash point tester

See 5 models
エーベル密閉式自動引火点試験器 abl-8afc / abl-8lfc
Abel Closed Cup Flash Point Tester

abl-8 is an automated Abel Closed Cup flash point tester.

タグ密閉式自動引火点試験器 atg-8wfc / atg-8afc / atg-8lfc
Tag Closed Cup Flash Point Tester

atg-8 is an automated Tag Closed flash point tester.

Automated Pensky-Martens Closed Cup Flash Point Tester

apm-100 is an automated Pensky-Martens Closed Cup flash point tester.

Cleveland Open Cup Flash Point Tester

aco-8 is an automated Cleveland Open Cup flash point tester.

Small Scale Closed Cup Flash Point Tester

asc-8 is an automated Small Scale Closed Cup flash point tester.

自動蒸留試験器 ad-7
Distillation Tester

A tester that automates the atmospheric distillation test method

Pour / Cloud / Freezing Point Tester

A tester to determine POUR POINT (PP) and CLOUD POINT (CP) with small specimen size and shorter tes…

自動目詰まり点試験器 AFP-102
CFPP Tester

A tester to determine Cold Filter Plugging Point (CFPP) of diesel fuel

自動アニリン点試験器 aap-6
Aniline Point Tester

A tester to determine aniline point for wide range of samples

Softening Point Tester

A tester to determine softening point of bitumen by using Ring-and Ball apparatus

ミクロ残留炭素分試験器 acr-m3mk2
Micro Carbon Residue Tester

A tester that automates the vaporizing / coking process of Micro carbon residue test

Reid Method Vapor Pressure Tester

A tester to determine Reid vapor pressure (RVP) utilizing a miniaturized cylinder.

Sulfur Analyzers

A fluorescent X-ray analyzer that analyzes total sulfur in petroleum products.

See 3 models
エネルギー分散蛍光X線硫黄分析計 rx-630SA
EDXRF Sulfur Analyzer (12 positions)

rx-630SA determines total sulfur in petroleum products using energy-dispersive X-ray fluorescence (…

エネルギー分散蛍光X線硫黄分析計 RX-360SH
EDXRF Sulfur Analyzer

RX-360SH is a single test version of X-ray sulfur meter taking the same measuring principle as that…

波長分散蛍光X線硫黄分析計 FX-700 Mk2
WDXRF Sulfur Analyzer

FX-700 Mk2 determines total sulfur in ultra low sulfur fuels using wavelength dispersive X-ray fluo…

分光式石油製品色試験器 OME 7700
Colorimeter for Petroleum Products

A tester to determine 4 kinds of Colors, utilizing the Tri-Stimulus values from spectroscopy method 

Cloud Point Tester for Surfactants

A tester to determine cloud point test of nonionic surfactants

Data File Export System

PC software that outputs test data to a file from Tanaka instruments