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Overview
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PostPrime Inc.

PostPrime operates a finance and economics-focused social networking platform ('PostPrime SNS') that enables users to learn about personal finance and investment in an accessible and engaging manner. The platform offers free and paid content features including text, image, audio, video, and live streaming, with a monetization mechanism for qualified creators ('Prime Creators') and a membership subscription service. Through its consolidated subsidiary TakaTrade Co., Ltd., the company also operates a commodity CFD trading platform ('TakaTrade'), which received its commodity futures trading license in May 2025.

Market Cap
¥1.64B
US$10.5M
EV
¥1.24B
US$7.88M
Stock¥133▼-10.74%
US$1 = ¥156.80 (2026-10-23)
LTM EV/EBITDA
NM
LTM EV/EBIT
NM
LTM PER
NM
LTM PBR
1.6
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-81.0%pt
10012
Oct 24, 25 – Oct 23, 26StockTOPIX
1Jul 16, 26Full-year FY2026/05 earnings announced
2Oct 16, 26Q1 FY2027/05 earnings announced
MC → EV Bridge
1.64BUS$10.5MMarket Cap0.48BUS$3.03M+ Debt0.88BUS$5.63M− Cash0.00BUS$0.00M− Inv. Sec.1.24BUS$7.88MEV
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Performance & Balance
Revenue 5Y (¥B)
0.64US$4.11M'22/50.79US$5.02M'23/50.95US$6.03M'24/50.90US$5.72M'25/50.55US$3.53M'26/5
EBITDA 5Y (¥B)
0.35US$2.25M'24/50.19US$1.18M'25/5-0.24-US$1.50M'26/5
Net Income 5Y (¥B)
0.20US$1.28M'22/50.19US$1.19M'23/50.26US$1.68M'24/50.09US$0.55M'25/5-0.28-US$1.77M'26/5
Capital Structure
69%
31%
EquityD/E 0.46xDebt
Liquidity vs Debt 5Y (¥B)▲ Net Cash
CashInv. Sec.Debt
'22/5'23/51.14US$7.26M'24/50.91US$5.82M'25/50.63US$4.02M'26/5
Shareholders
Top 10 hold 37.0%
as of 2026-05-31 · Source: Annual Securities Report
1
Sibridge LLC
19.80%
2
Morgan Stanley MUFG Securities Co., Ltd.
4.04%
3
Rakuten Securities, Inc. (Joint Account)
3.89%
4
SBI SECURITIES Co., Ltd.
2.12%
5
Teruaki YABUTA
1.42%
6
BNYM SA/NV FOR BNYM FOR BNY GCM CLIENT ACCOUNTS M LSCB RD (Standing Proxy: MUFG Bank, Ltd.)
1.36%
7
J.P.MORGAN SECURITIES PLC (Standing Proxy: JPMorgan Securities Japan Co., Ltd.)
1.22%
8
Naoto KAMIYAMA
1.20%
9
Monex, Inc.
1.01%
10
Yasutaka UCHIDA
0.98%
Management
6 officers
Satoru MATSUSHIMA
Representative Director, President
Apr 2005 Joined Masterpiece Group Co., Ltd. Apr 2016 Appointed Director, Masterpiece Group Co., Ltd. Oct 2017 Joined Boutiques Co., Ltd. Apr 2020 Appointed General Manager, Consulting Business Division, Boutiques Co., Ltd. Apr 2023 Appointed Executive Officer and General Manager, Administration Division, Boutiques Co., Ltd. Apr 2023 Appointed Representative Director and Vice President, Realive Inc. Oct 2023 Appointed Representative Director and President, Realive Inc. Apr 2025 Established Kokorogoto Inc. and appointed Representative Director (current) Mar 2026 Appointed Representative Director of the Company (current) May 2026 Appointed Representative Director, TakaTrade Co., Ltd. (current) Jul 2026 Appointed Representative Director, Infinity Life Inc. (current)
1981-07-28
Tsubasa MIZUGUCHI
Chairman of the Board and Director
May 2004 Established Sibridge Group Co., Ltd. and appointed Representative Director (current) Jul 2014 Appointed Representative Partner, CBI LLC (now Sibridge Inc.) Jun 2015 Appointed Outside Director, fonfun Inc. (Resigned Jun 2019) Jun 2020 Appointed Outside Director, fonfun Inc. Jun 2020 Appointed Representative Director, Sibridge Holdings Co., Ltd. (current) Mar 2023 Appointed Executive Director (Shokumu Shikkō-sha), Sibridge LLC (current) Jun 2023 Appointed Representative Director, fonfun Inc. (current) Jul 2024 Appointed Representative Director, M&A DX Inc. (current) Mar 2026 Appointed Chairman of the Board and Director of the Company (current)
1982-09-08
Yukihide NISHIKAWA
Director
Apr 2003 Joined Fields Co., Ltd. Aug 2007 Joined Alcana Inc. and appointed Director Apr 2011 Joined Sibridge Inc. (now Sibridge Group Co., Ltd.) (current) Jul 2016 Appointed President, Career Education Co., Ltd. (now Sibridge Inc.) Apr 2019 Executive Officer, Sibridge Group Co., Ltd. Sep 2019 Appointed President, Gigatrend Inc. (now Sibridge Inc.) Mar 2026 Appointed Outside Director of the Company (current)
1980-05-11
Dai KAWAMURA
Director, Audit and Supervisory Committee Member
Apr 1990 Joined Seino Transportation Co., Ltd. Oct 2005 General Manager, Business Planning and Administration Office, Seino Transportation Co., Ltd. Apr 2008 Branch Manager, Ogaki Branch, Seino Transportation Co., Ltd. Apr 2010 Executive Officer and General Manager, Gifu-Shiga Area, Seino Transportation Co., Ltd. Aug 2011 General Manager, Corporate Planning Office, Seino Holdings Co., Ltd. Dec 2019 Appointed Director and Vice President, Kanto Transportation Co., Ltd. Apr 2023 Appointed Vice President Executive Officer, Kanto Transportation Co., Ltd. Mar 2025 Retired as Vice President Executive Officer, Kanto Transportation Co., Ltd. Aug 2026 Appointed Outside Director (Audit and Supervisory Committee Member) of the Company (current)
1965-04-03
Masataka FURUKAWA
Director, Audit and Supervisory Committee Member
Apr 1996 Joined Japan Trade Insurance Organization Foundation Oct 1999 Joined Multiterm Inc. Sep 2005 Joined SBI Trade Wintech Co., Ltd. Aug 2016 Joined One Tap BUY Co., Ltd. (now PayPay Securities Corporation) Jun 2020 Joined Hash Dash Holdings Co., Ltd. Aug 2023 Joined Legenda Inc. (current) Aug 2023 Appointed Outside Audit & Supervisory Board Member of the Company Jan 2024 Concurrently seconded to Legenda Corporation Co., Ltd. (current) Oct 2024 Appointed Audit & Supervisory Board Member, TakaTrade Co., Ltd. (formerly PostPrime Trading Co., Ltd.) Aug 2025 Appointed Outside Director (Audit and Supervisory Committee Member) of the Company (current) Appointed Outside Director, TakaTrade Co., Ltd. (current)
1973-03-09
Hidemasa SUZUKI
Director, Audit and Supervisory Committee Member
Jan 2012 Registered as an attorney (Daini Tokyo Bar Association); opened Hide Law Office Jul 2012 Joined Harada International Law Office as Member Attorney Oct 2017 Joined Sakura Komichi Sogo Law Office as Partner Attorney (current) Aug 2026 Appointed Outside Director (Audit and Supervisory Committee Member) of the Company (current)
1982-02-16
Large Shareholding Reports
Cybridge G.K.
2026-06-17
19.80%→49.08%
Annual report (as of 2026-05-31): 19.80%
Goldman Sachs International
2026-04-22
5.00%→0.49%
Goldman Sachs International
2026-02-06
5.00%
J.P. Morgan Securities Japan Co., Ltd.
2026-02-04
4.99%→0.76%
Morgan Stanley MUFG Securities Co., Ltd.
2026-01-21
4.55%→3.53%
Cybridge G.K.
2026-01-16
19.80%
Annual report (as of 2026-05-31): 19.80%
DAN TAKAHASHI LLC
2026-01-16
19.80%→0.00%
Morgan Stanley MUFG Securities Co., Ltd.
2026-01-08
4.55%
J.P. Morgan Securities Japan Co., Ltd.
2026-01-06
4.99%
DAN TAKAHASHI LLC
2025-12-23
19.80%→19.80%
DAN TAKAHASHI LLC
2025-12-10
31.81%→19.80%
DAN TAKAHASHI LLC
2025-12-10
36.05%→31.81%
DAN TAKAHASHI LLC
2025-12-09
40.72%→36.05%
DAN TAKAHASHI LLC
2025-12-05
46.90%→40.72%
DAN TAKAHASHI LLC
2025-12-04
48.27%→46.90%
DAN TAKAHASHI LLC
2025-12-03
50.16%→48.27%
DAN TAKAHASHI LLC
2025-12-02
51.48%→50.16%
DAN TAKAHASHI LLC
2025-11-27
52.53%→51.48%
DAN TAKAHASHI LLC
2025-11-25
53.61%→52.53%
DAN TAKAHASHI LLC
2025-11-25
55.15%→53.61%
DAN TAKAHASHI LLC
2025-11-14
56.46%→55.15%
DAN TAKAHASHI LLC
2025-11-07
57.72%→56.46%
DAN TAKAHASHI LLC
2025-11-05
59.31%→57.72%
DAN TAKAHASHI LLC
2025-10-30
60.54%→59.31%
DAN TAKAHASHI LLC
2025-10-23
61.63%→60.54%
DAN TAKAHASHI LLC
2025-07-30
66.63%→61.63%
Disclosures
M&A / Other
2026-09-04
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M&A / Other
2026-08-31
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Primary Source Filings
TDnet
2026-10-15
Q1 Earnings Flash
FY ending May 2027
View PDF →
TDnet
2026-09-04
M&A / Other
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TDnet
2026-08-31
M&A / Other
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EDINET
2026-08-27
Annual Securities Report
Period: Jun 2025 – May 2026
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EDINET
2026-06-17
Large Shareholding Report
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EDINETAmended
2026-05-29
Amended Securities Registration Statement
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EDINET
2026-05-25
Securities Registration Statement
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EDINET
2026-04-22
Large Shareholding Report
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TDnet
2026-04-13
Q3 Earnings Flash
FY ending May 2026
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EDINET
2026-02-06
Large Shareholding Report
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EDINET
2026-02-04
Large Shareholding Report
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EDINET
2026-01-21
Large Shareholding Report
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EDINET
2026-01-16
Large Shareholding Report
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EDINET
2026-01-16
Large Shareholding Report
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EDINET
2026-01-14
Semi-Annual Securities Report
Period: Jun 2025 – May 2026
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EDINET
2026-01-08
Large Shareholding Report
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EDINET
2026-01-06
Large Shareholding Report
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EDINET
2025-12-23
Large Shareholding Report
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EDINET
2025-12-10
Large Shareholding Report
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EDINET
2025-12-10
Large Shareholding Report
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EDINET
2025-12-09
Large Shareholding Report
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EDINET
2025-12-05
Large Shareholding Report
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EDINET
2025-12-04
Large Shareholding Report
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EDINET
2025-12-03
Large Shareholding Report
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EDINET
2025-12-02
Large Shareholding Report
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EDINET
2025-11-27
Large Shareholding Report
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EDINET
2025-11-25
Large Shareholding Report
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EDINET
2025-11-25
Large Shareholding Report
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EDINET
2025-11-14
Large Shareholding Report
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EDINET
2025-11-07
Large Shareholding Report
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