CellSource Co., Ltd.

TSE:4880 Stock Report

Market Cap: JP¥6.5b

CellSource Management

Management criteria checks 1/4

CellSource's CEO is Masayuki Yamakawa, appointed in Nov 2025, has a tenure of less than a year. directly owns 36.15% of the company’s shares, worth ¥2.33B. The average tenure of the management team and the board of directors is 0.5 years and 4 years respectively.

Key information

Masayuki Yamakawa

Chief executive officer

n/a

Total compensation

CEO salary percentagen/a
CEO tenureless than a year
CEO ownership36.1%
Management average tenureless than a year
Board average tenure4yrs

Recent management updates

Recent updates

Analysis Article Dec 16

Investors Appear Satisfied With CellSource Co., Ltd.'s (TSE:4880) Prospects

There wouldn't be many who think CellSource Co., Ltd.'s ( TSE:4880 ) price-to-sales (or "P/S") ratio of 2.2x is worth a...
Analysis Article Apr 08

Risks Still Elevated At These Prices As CellSource Co., Ltd. (TSE:4880) Shares Dive 31%

CellSource Co., Ltd. ( TSE:4880 ) shareholders that were waiting for something to happen have been dealt a blow with a...
Analysis Article Dec 20

We Think That There Are More Issues For CellSource (TSE:4880) Than Just Sluggish Earnings

The market wasn't impressed with the soft earnings from CellSource Co., Ltd. ( TSE:4880 ) recently. Our analysis has...
Analysis Article Dec 19

Some CellSource Co., Ltd. (TSE:4880) Shareholders Look For Exit As Shares Take 25% Pounding

Unfortunately for some shareholders, the CellSource Co., Ltd. ( TSE:4880 ) share price has dived 25% in the last thirty...
Analysis Article Aug 13

A Look At The Fair Value Of CellSource Co., Ltd. (TSE:4880)

Key Insights The projected fair value for CellSource is JP¥1,410 based on 2 Stage Free Cash Flow to Equity With...
Analysis Article Jun 20

Shaky Earnings May Not Tell The Whole Story For CellSource (TSE:4880)

CellSource Co., Ltd.'s ( TSE:4880 ) weak earnings were disregarded by the market. Despite the market responding...

CEO

Masayuki Yamakawa (62 yo)

less than a year
Tenure

Mr. Masayuki Yamakawa is CEO of CellSource Co. Ltd. from November 1, 2025 and its Director since. January 2022 and serves as its President from 2025.Mr. Yamakawa serves as Chairman of CellSource Co. Ltd....


Leadership Team

NamePositionTenureCompensationOwnership
Masayuki Yamakawa
Chairmanless than a yearno data36.15%
¥ 2.3b
Tomohiro Iga
Executive Officerless than a yearno datano data
Hideto Kaneshima
Chief Technology Advisorno datano datano data
Sei Sasaki
Executive Officer & Head of Medical Support Divisionless than a yearno datano data
0.5yrs
Average Tenure

Experienced Management: 4880's management team is not considered experienced ( 0.5 years average tenure), which suggests a new team.


Board Members

NamePositionTenureCompensationOwnership
Masayuki Yamakawa
Chairman4.5yrsno data36.15%
¥ 2.3b
Tomohiro Iga
Executive Officerless than a yearno datano data
Takeshi Amemiya
Director8.9yrsno data0.32%
¥ 20.4m
Yoshitake Kamino
Independent Outside Directorno datano datano data
Tsuneyasu Ozaki
Independent Outside Director3.5yrsno datano data
4.0yrs
Average Tenure
58yo
Average Age

Experienced Board: 4880's board of directors are considered experienced (4 years average tenure).


Company Analysis and Financial Data Status

DataLast Updated (UTC time)
Company Analysis2026/07/05 01:58
End of Day Share Price 2026/07/03 00:00
Earnings2026/04/30
Annual Earnings2025/10/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

PackageDataTimeframeExample US Source *
Company Financials10 years
  • Income statement
  • Cash flow statement
  • Balance sheet
Analyst Consensus Estimates+3 years
  • Forecast financials
  • Analyst price targets
Market Prices30 years
  • Stock prices
  • Dividends, Splits and Actions
Ownership10 years
  • Top shareholders
  • Insider trading
Management10 years
  • Leadership team
  • Board of directors
Key Developments10 years
  • Company announcements

* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

CellSource Co., Ltd. is covered by 4 analysts. 1 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

AnalystInstitution
Masatoshi NagataIchiyoshi Research Institute Inc.
Kyoichiro ShigemuraNomura Securities Co. Ltd.
Kota MaedaNomura Securities Co. Ltd.