RHYTHM VIETNAM (SAIGON)
RHYTHM VIETNAM (SAIGON) CO., LTD.（RVS）
：EPE(Export Processing Enterprises)
The only manufacturer in Vietnam that handles metal stamping, heat treatment, plating, insert-molding and winding solenoid coils under one roof — giving Japanese and global companies a single, trusted partner to localize their supply chain without sacrificing the quality standards they built at home.
Since our establishment in 1995, Rhythm Vietnam (Saigon) Co., Ltd. (Ex. Kyoshin Vietnam Co., Ltd) has been engaged in the production of metal stamping products for more than 30 years in Vietnam.
The products made by our experienced Vietnamese staff are now widely used in automobiles, motorcycles, solar power generation, home appliances etc...and are exported to countries around the world, including Vietnam.
In addition to stamping products, we also design and manufacture stamping dies,
insert molding parts, winding coils and assembly parts. Moreover, we have our own plating line, which enables us to cover the entire process from stamping raw materials through plating on those surface and assembling into modules.
In the end of 2023, our factory 1 completed and activated our first solar panel installation. It generates approximately 500,000 kWh per year, representing approximately 10-12% of our total annual electricity usage.
※We have changed our company name from KYOSHIN VIETNAM CO., LTD. to RHYTHM VIETNAM (SAIGON) CO., LTD. effective April 2025.
Progressive Metal Stamping Parts
We provide an integrated one-stop service, covering everything from the design and machining of metal stamping dies to the manufacturing of progressive stamping parts.
Our facility is equipped with 24 stamping machines ranging from 25 to 220 tons, and we specialize in precision stamping work suitable for palm-sized components.
We can produce a wide variety of shapes for diverse applications, including drawn products, terminals, busbars, yokes, plates, holders, brackets, elements, laminated cores, clamps, retainers, and calipers.
Progressive in-die tapping and in-die riveting/crimping are also available.
Our facility is equipped with 24 stamping machines ranging from 25 to 220 tons, and we specialize in precision stamping work suitable for palm-sized components.
We can produce a wide variety of shapes for diverse applications, including drawn products, terminals, busbars, yokes, plates, holders, brackets, elements, laminated cores, clamps, retainers, and calipers.
Progressive in-die tapping and in-die riveting/crimping are also available.
Product Samples
Deep Drawing Parts
Brackets
Terminals/Busbars
Raw Material
| Materials | Raw Material Makers | Material Thickness | |
|---|---|---|---|
| Steel |
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| Non Ferrous Matals |
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※We use non-ferrous metals in both bare and plated finishes (Reflow Tin, Tin, Nickel, Gold, and Silver).
Colled rolled steel strip
Progressive Stamping Dies
Rhythm Vietnam (Saigon) has designed and built over 800 progressive dies in the past.
We are capable of producing large dies up to 1500mm in length. (Max. 220 tons for press machine)
Drawing, terminals, busbars, brackets, lamination cores, in-die tapping and in-die caulking/rivetting are all produced in-house.
A total of 20 members in the die making team perform design, machining, assembly, trial, and adjustment.
Our basic policy is to build 100% of the stamping dies we receive orders from our customers in-house. However, in cases where a large number of dies need to be produced at once, we may outsource processing to a third party in order to prioritize lead time.
※We select outside processing contractors that are capable of producing molds in accordance with our design and processing standards.
We are capable of producing large dies up to 1500mm in length. (Max. 220 tons for press machine)
Drawing, terminals, busbars, brackets, lamination cores, in-die tapping and in-die caulking/rivetting are all produced in-house.
A total of 20 members in the die making team perform design, machining, assembly, trial, and adjustment.
Our basic policy is to build 100% of the stamping dies we receive orders from our customers in-house. However, in cases where a large number of dies need to be produced at once, we may outsource processing to a third party in order to prioritize lead time.
※We select outside processing contractors that are capable of producing molds in accordance with our design and processing standards.
Materials for Dies
| Materials | Material Maker | Punches |
|---|---|---|
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Surface Treatment
We are one of the few press shops that can handle electro plating (reel-to-reel plating and barrel plating) in-house.
We are trying to shorten the lead time and stabilize the quality by doing integrated production from metal stamping to plating in-house.
Press materials include oxygen-free copper, tough pitch copper, brass, phosphor bronze, Corson alloys, cold-rolled steel sheets, and Soft Magnetic iron.
Plating quality evaluation includes plating thickness test, peel test, salt spray test, and solderability test.
We can provide daily plating solution management, periodic plating solution analysis, and various environmental surveys of plating chemicals.
We are taking all possible measures to comply with the environmental regulations of the authorities regarding wastewater treatment and auditing.
For other surface treatments, we use external subcontractors. See below.
We are trying to shorten the lead time and stabilize the quality by doing integrated production from metal stamping to plating in-house.
Press materials include oxygen-free copper, tough pitch copper, brass, phosphor bronze, Corson alloys, cold-rolled steel sheets, and Soft Magnetic iron.
Plating quality evaluation includes plating thickness test, peel test, salt spray test, and solderability test.
We can provide daily plating solution management, periodic plating solution analysis, and various environmental surveys of plating chemicals.
We are taking all possible measures to comply with the environmental regulations of the authorities regarding wastewater treatment and auditing.
For other surface treatments, we use external subcontractors. See below.
In-house Plating (Reel-to-reel )
・Nickel（Ni）、Tin（Sn）--- all by electro plating
・Applicable material thickness for reel-to-reel plating: t0.2 mm to t1.2 mm
・Applicable material width for reel-to-reel plating：Max50㎜
Cu（Base）＋Ni、Cu（Base）＋Sn、Ni、Sn、Cu（Base）＋Ni（Base）＋Sn、Ni（Base）＋Sn
Various combinations are available.
※For reflow tin, please contact us.
・Applicable material thickness for reel-to-reel plating: t0.2 mm to t1.2 mm
・Applicable material width for reel-to-reel plating：Max50㎜
Cu（Base）＋Ni、Cu（Base）＋Sn、Ni、Sn、Cu（Base）＋Ni（Base）＋Sn、Ni（Base）＋Sn
Various combinations are available.
※For reflow tin, please contact us.
In-house Plating (Barrel Plating)
・Copper（Cu）、Nickel（Ni）、Tin（Sn）--- all by electro plating
Cu（Base）＋Ni、Cu（Base）＋Sn、Ni、Sn、Cu（Base）＋Ni（Base）＋Sn、Ni（Base）＋Sn
Various combinations are available.
Cu（Base）＋Ni、Cu（Base）＋Sn、Ni、Sn、Cu（Base）＋Ni（Base）＋Sn、Ni（Base）＋Sn
Various combinations are available.
Surface finish ( level of brightness)
In many cases, the finish of the plating is specified on the drawing as bright, semi-bright, or non-bright.
Each customer has different standards and judgments regarding the quality of these finishes ( brightness).
Since it is not possible to adjust the brightening agent in the plating solution tank for each customer's specifications, we judge whether the plating tank is brightened or not by adding a brightening agent.
※We will consult with you in advance about any brightness issues and take necessary measures such as limit sample management.
Each customer has different standards and judgments regarding the quality of these finishes ( brightness).
Since it is not possible to adjust the brightening agent in the plating solution tank for each customer's specifications, we judge whether the plating tank is brightened or not by adding a brightening agent.
※We will consult with you in advance about any brightness issues and take necessary measures such as limit sample management.
Subcontract plating (Barrel Plating)
・Electroless nickel plating
・Zinc Chromate Plating
※Please ask us about the finish color of zinc chromate plating.
・Zinc Chromate Plating
※Please ask us about the finish color of zinc chromate plating.
Subcontract plating (Rack/Hanging Plating)
・Electroless nickel plating
・Zinc Chromate Plating
※A special hanging jig (hanger) may be required depending on the part shape.
※Please ask us about the finish color of zinc chromate plating.
・Zinc Chromate Plating
※A special hanging jig (hanger) may be required depending on the part shape.
※Please ask us about the finish color of zinc chromate plating.
Subcontract Coating（ED Coating）
ED coating is currently our only proven method for mass-produced parts. (See the photo below for an example.)
Cationic ED Coating
We can make a hanging jig (hanger) that matches the shape of the part.
In cationic ED coating, jig marks (areas where no coating is applied) are always left on the parts that are exposed to the hanging jigs (hangers).
We will consult with you in advance about the area where the jig will be hooked.
In cationic ED coating, jig marks (areas where no coating is applied) are always left on the parts that are exposed to the hanging jigs (hangers).
We will consult with you in advance about the area where the jig will be hooked.
Vacuum Heat Treatment, Magnetic Annealing
Magnetic annealing treatment are available for ferrous material parts after metal stamping.
Set the workpiece→Heat up→Holding at about 850°C→Cooling→Take out the work
Nitrogen gas can be used to control cooling, allowing for rapid or slow cooling within a specified time.
It is convenient to set with plating after magnetic annealing.
We keep annealing temperature charts for traceability.
Set the workpiece→Heat up→Holding at about 850°C→Cooling→Take out the work
Nitrogen gas can be used to control cooling, allowing for rapid or slow cooling within a specified time.
It is convenient to set with plating after magnetic annealing.
We keep annealing temperature charts for traceability.
Over Molding/Insert Molding
We perform over-mold various stamping parts (materials include oxygen-free copper, tough pitch copper, brass and cold-rolled steel sheets) that we process ourselves, machining parts that we purchase from outside, and nuts.
We have a total 19 vertical injection molding machines ranging from 40 to 150 tons.
After molding, tie bar cutting, conductivity testing, air leakage testing, water leakage testing, and filter welding are also available.
We have a total 19 vertical injection molding machines ranging from 40 to 150 tons.
After molding, tie bar cutting, conductivity testing, air leakage testing, water leakage testing, and filter welding are also available.
Product samples
Terminal Base
Material：PBT GF40
Application：
Air conditioner switch for Automotive
Material：PBT GF40
Application：
Air conditioner switch for Automotive
Case
Material：PBT GF40
Application：
Radiator fan motor for Automotive
Material：PBT GF40
Application：
Radiator fan motor for Automotive
Busbar Module
Material：PBT GF30
Application：
Radiator fan motor for Automotive
Material：PBT GF30
Application：
Radiator fan motor for Automotive
Battery Terminal
Material：PC
Application：Motor Assisted Bicycle
Material：PC
Application：Motor Assisted Bicycle
Plastic Regin
| Materials | Resin Maker | Plastic Molds | |
|---|---|---|---|
| Plastic Regin |
|
|
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PA66 Resin
Solenoid Coils
We produce winding coils (solenoid coils) mainly used for various solenoid valves in automobiles.
These are assembled into EGRV（Exhaust Gas Recirculation）、VTC（Valve Timing Control）、IECAS（Intelligent Electronic Control Adaptive Suspension）、Injector、EOP（Electrical Oil Pump） and components.
We manufactures a complete set of coil components in-house, including terminals, other stamped parts, and bobbin molding, and performs integrated in-house production from winding, spot welding, and exterior molding to resistance and impulse waveform testing.
These are assembled into EGRV（Exhaust Gas Recirculation）、VTC（Valve Timing Control）、IECAS（Intelligent Electronic Control Adaptive Suspension）、Injector、EOP（Electrical Oil Pump） and components.
We manufactures a complete set of coil components in-house, including terminals, other stamped parts, and bobbin molding, and performs integrated in-house production from winding, spot welding, and exterior molding to resistance and impulse waveform testing.
Materials
| Copper Wire | Wire sizes |
|---|---|
|
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Press Machine/Stamping Machines
| Maker | Tonnage Capacity | Quantity |
|---|---|---|
| ISIS | 25T | 1 |
| ISIS, KYORI | 40T | 2 |
| KOMATSU | 45T | 1 |
| ISIS, KYORI, AIDA | 60T | 3 |
| AIDA, SEYI | 80T | 9 |
| AIDA | 110T | 2 |
| AIDA, SEYI | 160T | 4 |
| AIDA | 200T | 1 |
| AIDA | 220T | 1 |
| Total | 24台 | |
Vertical Type Injection Molding Machines
| Maker | Tonnage Capacity | Quantit |
|---|---|---|
| NISSEI | 50T | 3 |
| NISSEI | 60T | 1 |
| Sodick, NISSEI | 75T | 8 |
| JSW, NISSEI | 100T | 5 |
| NISSEI | 150T | 2 |
| Total | 19 | |
Horizontal Type Injection Molding Machines
| Maker | Tonnage Capacity | Quantity |
|---|---|---|
| NISSEI | 30T | 1 |
| JSW | 55T | 2 |
| NISSEI | 60T | 2 |
| NISSEI | 80T | 2 |
| NISSEI | 110T | 1 |
| Total | 8 | |
Measuring Instruments
| Measuring Instruments | Maker | Quantity |
|---|---|---|
| 2D Tool Microscope | Mitsutoyo | 4 |
| 3D Coordinate Measuring Machine | Mitsutoyo | 2 |
| Rockwell Hardness Tester | Akashi | 1 |
| Vickers Hardness Tester | Matsuzawa | 1 |
| Contracer | Mitsutoyo | 1 |
| Surface Roughness Tester | Mitsutoyo | 1 |
| X-ray Plating Thickness Tester | FISCHER | 1 |
Evaluation Equipment
| Evaluation Equipment | Quantity |
|---|---|
| Thermal Shock Chamber (ESPEC) | 1 |
| Temperature and Humidity Chamber(ESPEC) | 1 |
| Solderability Tester | 1 |
| Pin Hole Tester | 1 |
| X-ray Inspection System | 1 |
| XRF (HORIBA) | 1 |
| Salt Spray Tester | 1 |
Machine Tools (For Tooling)
| Machine Tools | Maker | Quantity |
|---|---|---|
| WEDM | Sodick、Fanuc | 7 |
| EDM | Sodick | 1 |
| Small-hole Drilling EDM | Sodick | 1 |
| Surface Grinder | Okamoto | 6 |
| Milling Machine | Makino、Kanto | 5 |
| Machining Center | Makino、OKK | 2 |
| Lathe | Takisawa | 2 |
| Drilling Machine | Hitachi | 1 |
| Band Sawing Machine | Tsune、Saw King | 2 |
Other Facilities
| Other Facilities | Quantity |
|---|---|
| Ultrasonic Cleaning Machine (Hydrocarbon) | 2 |
| Ultrasonic Cleaning Machine (Ionized Water) | 1 |
| Heat Treatment Furnace | 3 |
| Vacuum Heat Treatment Furnace | 3 |
| Sand Blaster | 1 |
| Vibratory Barrel Finishing Machine | 3 |
| Rotary Barrel Finishing Machine | 2 |
| Company Name | RHYTHM VIETNAM (SAIGON) CO., LTD. |
|---|---|
| Establishment | March/1995 |
| Legal Capital | 4,000,000 USD |
| Business/Services | Progressive Metal Stamping、Designing and Tooling Die、Over Molding(Insert Molding)、Assembly、Barrel Plating、Reel-to-reel Plating、Vacuum Heat Treatment |
| Address | Lot AM. 34b-36-38a and Lot AN. 27b-29-31-33-35a, Road 12, Tan Thuan EPZ, Tan Thuan Ward, Ho Chi Minh City, Vietnam |
| Telephone | +84 283 770 1416 |
| FAX | +84 283 770 1415 |
| International Certification | ISO9001、ISO14001、IATF16949 |
| Land Used | Factory 1：10,000㎡ Factory 2：5,000㎡ |
| Work force | 329 employees（April 2026） |
History
| 1995 | Established and started operation |
|---|---|
| 1999 | Acquired ISO9002：1994 |
| 2002 | Inauguration of new factory |
| Acquired ISO14001：1996 | |
| 2004 | Introduced Barrel plating |
| 2005 | Acquired ISO/TS16949 |
| 2011 | Joined RHYTHM WATCH Group |
| 2012 | Established fully owned subsidiary in Hanoi (Rhythm Kyoshin Hanoi, currently Rhythm Vietnam (Hanoi) Noi Bai Branch) |
| 2018 | Acquired IATF16949 |
| Introduced Reel-to-reel plating | |
| 2020 | Became subsidiary of RHYTHM Co., Ltd. |
| 2024 | Our fully owned subsidiary Rhythm Kyoshin Hanoi has been merged by Rhythm Precision Vietnam and changed its name to Rhythm Vietnam (Hanoi) Noi Bai Branch. |
| 2025 | Changed company name from Kyoshin Vietnam Co., Ltd. to Rhythm Vietnam (Saigon) Co., Ltd. |
Valued Customers
| NIDEC POWERTRAIN SYSTEMS Gr. | RYOSHO | MITSUBA Gr. | KYOKUTO ELECTRIC |
| HARADA INDUSTRY Gr. | JABIL | NAKAMURA ELECTRIC | MINEBEA ACCESS SOLUTIONS |
| MARELLI Gr. | ASTEMO | DENSO | YAMAHA MOTOR ELECTRONICS |
| NIPPON SEIKI | TAKAKO | ARION ELECTRIC |
Rhythm Vietnam (Saigon), a member of the Rhythm Group, is dedicated to developing products that not only perform exceptionally but also contribute to a sustainable future. In the end of December 2023, we made a significant leap in this direction by leading the installation and launch of photovoltaic panels. These panels have a remarkable yearly output of approximately 500,000 kWh, which is comparable to supplying energy to around 120 average-sized homes in Japan for a year!
Our company operates in compliance with environmental regulations established by the Vietnamese government and has obtained the necessary environmental license.
We take great pride in fostering a diverse and inclusive workforce. With 66% of our workforce being female and/or diverse, we are steadfast in our commitment to creating an equitable and welcoming workplace for all.
Moreover, 44% of our management positions are held by female and/or diverse individuals. This is a pivotal achievement in our ongoing efforts to shatter gender barriers and champion equality in leadership.
We remain dedicated to these principles and continually strive to create an environment where every individual feels respected and empowered to succeed.
Moreover, 44% of our management positions are held by female and/or diverse individuals. This is a pivotal achievement in our ongoing efforts to shatter gender barriers and champion equality in leadership.
We remain dedicated to these principles and continually strive to create an environment where every individual feels respected and empowered to succeed.
