Japan Insider Activity (EDINET) — 2026-05-18

by japan-insider-activities-daily

🇯🇵 EDINET DB Report — 2026-05-18

🔁 BUYBACK — 2652 Mandarake Read: Mandarake completed a ToSTNeT-3 立会外 off-market repurchase and has closed out the programme — a management-confidence signal.

🔁 BUYBACK — 409A Orion Beer Read: Orion Beer announced a ToSTNeT-3 立会外 purchase of its own shares.

🔁 BUYBACK — 9788 NAC Read: NAC completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 2784 Alfresa Holdings Read: Alfresa Holdings completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 7064 HouTV Read: HouTV cancelled (retired) treasury shares, permanently reducing shares outstanding.

🔁 BUYBACK — 2911 Asahimatsu Foods Read: Asahimatsu Foods completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 5598 Yottavias Read: Yottavias completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 8252 Marui Group Read: Marui Group completed its buyback programme and has closed out the repurchase.

🔁 BUYBACK — 7435 Nadex Read: Nadex reported monthly buyback progress, then closed the programme and retired the repurchased shares via cancellation.

🔁 BUYBACK — 3675 Cross Marketing Group Read: Cross Marketing Group completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 3512 Nippon Felt Read: Nippon Felt reported the result of a ToSTNeT-3 立会外 share repurchase.

🔁 BUYBACK — 9402 CBC Read: Chubu-Nippon Broadcasting completed an N-NET3 off-market repurchase and has ended the programme.

🔁 BUYBACK — 4275 Carlit Read: Carlit completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 5280 Yoshicon Read: Yoshicon reported the result of a ToSTNeT-3 立会外 share repurchase.

🔁 BUYBACK — 9980 MRK Holdings Read: MRK Holdings reported the result of a ToSTNeT-3 立会外 share repurchase.

🔁 BUYBACK — 7184 Toyama Daiichi Bank Read: Toyama Daiichi Bank completed its buyback programme and has closed out the repurchase.

🔁 BUYBACK — 8358 Suruga Bank Read: Suruga Bank disclosed its monthly buyback progress — the repurchase programme is still running.

🔁 BUYBACK — 9326 Kantsu Holdings Read: Kantsu Holdings completed a ToSTNeT-3 立会外 repurchase and has ended the programme.

🔁 BUYBACK — 3121 Merchant Bankers Read: Merchant Bankers amended its existing buyback authorization to increase the repurchase ceiling — an enlarged mandate under the Companies Act 165(2) articles provision.

🔁 BUYBACK — 2917 Omoriya Read: Omoriya announced a NEW buyback authorization and will immediately execute part of it via ToSTNeT-3 立会外 purchase.

🔁 BUYBACK — 3415 TOKYO BASE Read: TOKYO BASE resolved a NEW buyback authorization (取得枠決定), opening a fresh repurchase programme.

🔁 BUYBACK — 8742 Kobayashi Yoko Read: Kobayashi Yoko reported the result of a ToSTNeT-3 立会外 share repurchase.

🎯 TOB — 9691 Ryomo Systems ← Chubu Electric Power (9502), amendment, ¥5,200/share (+37.02%), 2026-05-15–2026-07-08 Read: Chubu Electric Power filed an amendment to its co-bid for Ryomo Systems, keeping the offer at ¥5,200/share (37.02% premium) with the window running to 8 July. Source: https://www.chuden.co.jp/publicity/press/1217784_3273.html

🎯 TOB — 9691 Ryomo Systems ← Mitsuba (7280), amendment, ¥5,200/share (+21.78%), 2026-05-15–2026-07-08 Read: Co-bidder Mitsuba filed its own amendment to the same Ryomo Systems offer at ¥5,200/share (21.78% premium over Mitsuba's reference price), with the offer period unchanged through 8 July. Source: https://kabukiso.com/apply/tob/2026/ryomo.html

🎯 TOB — 7317 Matsuya R&D ← OMRON Healthcare, launch, ¥1,110/share, 2026-05-19–2026-06-15 Read: Matsuya R&D's board has unanimously endorsed OMRON Healthcare's TOB at ¥1,110/share and is recommending shareholders tender, with the offer window running 19 May–15 June. Source: https://maonline.jp/tobnews/2026_048a

🎯 TOB — 7317 Matsuya R&D ← OMRON Healthcare (sub of 6645 OMRON), launch; price: see filing Read: Parent company OMRON (6645) separately disclosed the TOB launch by its subsidiary OMRON Healthcare for Matsuya R&D — same deal as the entry above; no additional offer terms in this parent filing.

📊 GUIDANCE REVISED — 7673 Daiko Tsusho Read: Daiko Tsusho revised both its profit forecast and dividend forecast with no stated direction — check the filing for revised figures.

📊 GUIDANCE REVISED — 186A Astroscale Holdings Read: Astroscale Holdings revised its FY2026 April full-year consolidated earnings forecast with no stated direction — check the filing for revised figures.

📊 GUIDANCE REVISED — 398A P-Real Quality Read: P-Real Quality revised its full-year forecast following a subsidiary absorption merger that will book a special gain on eliminated shares (抱合せ株式消滅差益) — a one-off lift, but net direction not stated in the title.

🔴 DISTRIBUTING — 5240 monoAI technology ← Kaitaro Honjo, 16.43% (decreased by 1.55pp from prior filing) Read: The founder and CEO of monoAI technology trimmed his stake by 1.55pp, citing a routine threshold trigger — he retains a 16.43% controlling position and states long-term stable-shareholder intent.

🔴 DISTRIBUTING — 4584 KidsWell Bio ← Noritsu Koki, 19.08% (decreased by 13.52pp from prior filing) Read: Noritsu Koki shed 13.52pp of KidsWell Bio in a single filing — more than halving its strategic stake — a significant withdrawal of corporate-partner support.

🔴 DISTRIBUTING — 281A Informetis ← Itochu Enex, 2.95% (decreased by 2.28pp from prior filing) Read: Itochu Enex trimmed its Informetis stake by 2.28pp, dropping it to 2.95% and below the 5% major-holder threshold.

👤 FOUNDER/INSIDER — 7681 Leoclan ← A&M, 36.50% Read: A&M (the representative director's personal asset management vehicle) filed a routine change report reflecting internal reallocation among joint holders — no change to the insider's underlying economic interest.

🔵 MAINTENANCE • 5590 NetStars ← LUN Partners Capital Limited 3.95% • 5016 JX Metals ← ENEOS Holdings 42.38% Read: LUN Partners filed an amendment following a portfolio reduction in NetStars, and ENEOS Holdings updated its JX Metals filing to register a newly entered share-pledge agreement — both are administrative filings with no new directional intent.