English

Making everyday life more comfortable through software

News

  1. Tetsuzuki Navi

    Released Tetsuzuki Navi 2.0.2 for iOS. Following a legal amendment, the deadline to claim pension division and property division after a divorce on or after April 1, 2026 has been extended from two years to five, and the guidance on the divorce date screen has been updated. Also updated the guidance for the date entered for a new job, and added a link to the Tetsuzuki Navi X account (@stepnavi_com) on My Page.

  2. NIKENME

    Released NIKENME 1.2.2. The App Store screenshots and description have been updated. The app’s features and usage are unchanged.

  3. Tetsuzuki Navi

    Released Tetsuzuki Navi 2.0.1 for iOS. In some prefectures such as Tokyo, corporate filings are handled by a separate prefectural tax office, so the app now shows that office for filings when a company is established or dissolved. Welfare office names now follow the list of the Ministry of Health, Labour and Welfare, and designated cities show the welfare office of each ward. Also fixed an issue where office names were not shown for Sue, Fukuoka.

  4. Tetsuzuki Navi

    Released Tetsuzuki Navi 2.0.0 for iOS. Every screen has been redesigned, and the next procedure and its target date now appear at the top of the Home tab and in a widget. With pregnancy, building a custom home, and a lost or stolen wallet or phone added, it now covers 40 life events. Also fixed an issue where events added to the iPhone calendar appeared on two consecutive days, and an issue where the reminder three days before was missing.

  5. BlueHarbor

    Published the page for BlueHarbor, a Windows app, and its privacy policy. We are preparing to release it on the Microsoft Store.

Earlier news
  1. KOSNiZ

    This website is now also available in English, Chinese (Simplified and Traditional) and Korean.

  2. KOSNiZ

    Added pages for Tetsuzuki Navi, NIKENME and BlueHarbor. BlueHarbor is a Windows app that we are preparing to release.

  3. NIKENME

    Released NIKENME 1.2.1. With the walking time set to “No limit”, the app now searches a wider area. If the connection fails, an error is shown and you can try again.

  4. Tetsuzuki Navi

    Released Tetsuzuki Navi 1.3.1 for iOS. Fixed an issue where the app could stay on a blank white screen at launch, and matched the corner rounding of cards and buttons to the web version.

  5. NIKENME

    Released NIKENME 1.2.0 with a new app icon and larger buttons for walking time and sort order.

  6. KOSNiZ

    Added NIKENME (iOS app, released in March 2026) to this website.

  7. KOSNiZ

    Launched this website.

  8. Tetsuzuki Navi

    Released Tetsuzuki Navi 1.3.0 for iOS. Events can now be added directly to the iPhone Calendar, and the plan screen has been reorganized.

  9. Tetsuzuki Navi

    Released the iOS version of Tetsuzuki Navi on the App Store.

About

We develop and operate apps and web services for everyday life.

Our products support everyday situations, from checking administrative procedures and finding restaurants to receiving Bluetooth audio. We handle everything from planning and development to operation.

About KOSNiZ

Business

Administrative procedure guide

Tetsuzuki Naviてつづきナビ

  • Web
  • iOS

Tetsuzuki Navi puts the procedures that government offices and companies require for moving, marriage, childbirth, inheritance, tax returns and other life events in order of deadline. You answer a few questions, and it turns what to submit, by when and where, into a single plan.

Coverage
40 life events and 740 procedures (as of October 2026)
Offices
Your postcode gives you the name of the municipal office or tax office that handles your case.
Schedule
Check it on a calendar. The iOS app also sends a reminder on the target date.

Learn more（Tetsuzuki Navi）Open the web versionView on the App Store (Japan)

Restaurant finder app

NIKENMEニケンメ!

  • iOS

NIKENME is an app for finding the next place to go on your way home after drinks. It lists restaurants and bars near where you are, together with the time left until they close and how many minutes away they are on foot.

Genres
18 genres, including izakaya and bars
Distance
Within 3 to 15 minutes on foot, or no limit
Restaurant data
HotPepper Gourmet Web Service

Learn more（NIKENME）View on the App Store (Japan)

Bluetooth audio receiver app

BlueHarbor

  • Windows
Not yet released

BlueHarbor receives audio over Bluetooth from iOS, iPadOS and Android smartphones and tablets and from macOS computers, and plays it through the speakers or headphones connected to your Windows PC.

Devices
Up to 2 at once, with the volume set for each device
Delay
6 levels from 100 to 1000 ms, plus Auto
Availability
Preparing for release on the Microsoft Store

Learn more（BlueHarbor）