KEYCOM provides solutions in the 300 GHz to 1 μHz frequency range (SHF/EHF/MW/UHF/VHF/ULF).
We undertake designing, manufacturing and measuring. Please feel free to contact us.

KEYCOM Provides Solutions in the 10 μHz-300 GHz
(infrasonic / VHF / UHF / microwave / millimeter wave / super-high) Frequency Range

Model No.

KEYCOM develops and manufactures highly accurate and reliable measurement components, devices and systems in the field of 10 μHz-300 GHz (infrasonic / VHF / UHF / microwave / millimeter wave / super-high) .

From small components / devices to large systems, we support your research and development with everything we've got.

If you have any inquiries or face problems in proceeding with your project, please feel free to contact us via e-mail: or phone.

We can also flexibly arrange Online meeting in English/Chinese (all platform acceptable) .
If you need to discuss with us in detail, please writedown in e-mail information as below;

・Online meeting request
・Preferred date and time (e.g., April 1, 2:00 pm* or later, about 1 hour)

  *The time is based on Japan Standard Time.


Microwave Workshop & Exhibition 2021 (MWE 2021)

KEYCOM is going to participate in MWE 2021, to be held at Pacifico Yokohama on 24-26th Nov.

Booth Number of KEYCOM's exhibition: C-02

Please check the link for details of MWE2021.

KEYCOM's Characteristic and Cutting-edge Products

Ultra-low,Superconductivity products

KEYCOM has more than 20 years of experience in the field of ultra-low temperature and superconductivity, providing tools and systems such as cables and fixtures to more than 200 research institutes worldwide.
In particular, Keycom has become an indispensable partner for research institutions in the field of Quantum Computing.

NbTi-NbTi Superconducting Coaxial Cables [UPJ07]

Superconduction coxial cable for cryogenic and strong electromagnetic field, recognized by research institutions all over the world. Highly effective at thermal gradient below 4K.

Original, High-Performance, Practical Measurement System

TE-mode Open Resonator Relative permittivity/dielectric loss tangent measurement system [DPS19]

Also called a Split Cylinder Resonator, the system performs measurement by inserting a sheet sample between the resonators.

The problem with conventional, so-called "Split Cylinder Resonator with slit structure" is that it does not give accurate measurement values.

To solve this problem, KEYCOM has prepared a Cavity vertical movement device (patent pending) that freely controls the resonator gap to facilitate sample insertion and measurement of AIR resonance Q-value.

LiDAR Test System --- Moving Target Type [LTS03]

Moving target type has been newly added to KEYCOM's LTS(LiDAR Test System) series.
This type enables more realistic testing by varying the relative distance (5m to 300m).
The system is very compact, so that it can be used on a desk in a room for smooth verification of LiDAR functions.

Material Measurement Service

KEYCOM has not only developed measurement devices and systems based on its advanced technologies for products in the 10μHz~300GHz (VHF/UHF/Microwave/Millimeter wave) field, but has also refined its measurement technologies for a wide variety of materials over 25 years of providing measurement services.

In addition to our original measurement equipment, we also own a 110 GHz vector network analyzer, a 110 GHz scalar network analyzer, an 80 GHz spectrum analyzer, a 70 GHz oscilloscope, and various other measurement equipment.

This allows us to cover almost all of the material measurement needs, including solids, sheets, films, powders, liquids, and multilayer structures.

If you are facing difficulties as following cases, please don't hesitate to consult with us;

  • You only need to make a few times of measurements
  • You want accurate measurement data in a hurry
  • You have no plan to own measurement equipment at the moment
  • You are wondering if you can really measure the very material right in front of you
    (with some problems in characteristics, thinness, size, etc.)

KEYCOM's Technology recognized Worldwide

Award at ICF (April,2013)

At the 11th International Ferrite Conference (abbreviation: ICF11),
KEYCOM's product
"High Frequency Magnetic Measurement System from 100kHz to 10GHz"
have been awarded the ICF11 New Product & Novel Technology Award.

・IEC 60556 Ad2・2(2016)
・IEC/TR 63307 Ed.1.0:2020(en)

Member of Standardization Committee

Recognized achievements in
  • Permittivity measurement
  • Radio wave absorption rate measurement
KEYCOM has been selected as a standardization committee member of the IEC (International Electrotechnical Commission) / JIS for permittivity measuring devices, etc.

KEYCOM's unique technology becoming Global/Japan's Standard

  1. KEYCOM's method for measuring the dielectric characteristics in the millimeter wave band has become JIS standard (JIS R 1660-2).
  2. KEYCOM's method for measuring the amount of reflection attenuation of the radio wave absorber has become IEC standard (IEC62431) and JIS standard (JIS R 1679).

Announcement of our Holidays

Our office will be closed during the following period:

August 10th, 2022 to 21st, 2022
We will open from Monday, August 22nd and we apologize for your inconvenience during this period.

National holidays in 2022:

01 Jan   New Year’s Day
10 Jan   Coming of Age Day(Second Monday in January)
11 Feb   National Foundation Day
23 Feb   Emperor’s Birthday
21 Mar   Vernal Equinox Day
29 Apr   Shōwa Day
03 May   Constitution Memorial Day
04 May   Greenery Day
05 May   Children’s Day
18 Jul   Marine Day(Third Monday in July)
11 Aug   Mountain Day
19 Sep   Respect for the Aged Day(Third Monday in September)
23 Sep   Autumnal Equinox Day
10 Oct   Sports Day(Second Monday in October)
03 Nov   Culture Day
23 Nov   Labor Thanksgiving Day