Ji-sedai.jp ジセダイ―星海社がおくる、行動機会提案サイト
「ジセダイ」は、20代以下の若者に向けた、行動機会提案サイトです。読む→考える→行動する。このサイクルを、困難な時代にあっても前向きに自分の人生を切り開いていこうとする次世代の人間に向けて提供し続けます。
Server IP address resolved: Yes
Http response code: 200
Response time: 0.86 sec.
Last Checked: 01/29/2026
Ji-sedai.jp attracts 616 unique visitors daily, generating 616 pageviews. The estimated value of ji-sedai.jp is 6,249 USD. Each visitor views approximately 1.07 pages on average.
According to Majestic's traffic estimates, ji-sedai.jp ranks 40,111 globally.
Ji-sedai.jp server is located in Japan, so we cannot determine if the distance might affect the page load time.
See the list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.
Ji-sedai.jp is registered with the .JP top-level domain. Explore additional websites within the .JP zone.
A recent examination on (August 12, 2022), indicates that ji-sedai.jp has an expired SSL certificate issued by Let's Encrypt (expired on November 01, 2022). Click the "Refresh" button in the Safety Information section for updated SSL details. See the list of websites using SSL certificates issued by Let's Encrypt.
According to Google Safe Browsing, Google Safe Search, Symantec and Web of Trust ji-sedai.jp appears to be a safe domain.
Based on Google's Mobile-Friendly test, ji-sedai.jp is optimized for mobile and tablet devices.
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.
Norton ConnectSafe evaluates ji-sedai.jp for any unsafe and insecure content. The results are critical for families with young children.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee assesses ji-sedai.jp for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze ji-sedai.jp for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the ji-sedai.jp. This reputation system receives ratings from users and information from third-party sources, assesses the ji-sedai.jp for safety features and confirms, whether ji-sedai.jp is suitable for children.
| Domain | ji-sedai.jp |
| Issuer Organization | Let's Encrypt |
| Issuer | R3 |
| Algorithm | RSA-SHA256 |
| Valid form | 08/03/2022 |
| Expiration | 11/01/2022 |
| Signed | Certificate is not self signed |
| Additional Domains |
ji-sedai.jp |
ASN ID: 16509
ASN Title: AMAZON-02 - Amazon.com, Inc., US
Last Update: 12/17/2025
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
ASNumber: 16509
ASName: AMAZON-02
ASHandle: AS16509
RegDate: 2000-05-03
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/16509
OrgName: Amazon.com, Inc.
OrgId: AMAZON-4
Address: 1918 8th Ave
City: SEATTLE
StateProv: WA
PostalCode: 98101-1244
Country: US
RegDate: 1995-01-23
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/AMAZON-4
OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN
OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN
RTechHandle: AC6-ORG-ARIN
RTechName: Amazon-com Incorporated
RTechPhone: +1-206-266-2187
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/AC6-ORG-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
[ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]
Domain Information: [ドメイン情報]
[Domain Name] JI-SEDAI.JP
[登録者名] 株式会社 星海社
[Registrant] STAR SEAS COMPANY
[Name Server] ns-852.awsdns-42.net
[Name Server] ns-1891.awsdns-44.co.uk
[Name Server] ns-1395.awsdns-46.org
[Name Server] ns-197.awsdns-24.com
[Signing Key]
[登録年月日] 2011/08/05
[有効期限] 2025/08/31
[状態] Active
[最終更新] 2024/09/01 01:05:04 (JST)
Contact Information: [公開連絡窓口]
[名前] 太田 克史
[Name] ota katsushi
[Email] info@seikaisha.co.jp
[Web Page]
[郵便番号] 112-0013
[住所] 東京都文京区音羽1-17-14
音羽YKビル4階
[Postal Address] 4F,otowa-YK, 1-17-14, otowa
bunkyo-ku,Tokyo,Japan
[電話番号] 03-6902-1730
[FAX番号]
| Host | A Record | TTL |
|---|---|---|
| ji-sedai.jp | 210.151.43.140 | 3600 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| ji-sedai.jp | mail.ji-sedai.jp | 0 | 86400 |
| Host | NS Record | TTL |
|---|---|---|
| ji-sedai.jp | ns.ji-sedai.jp | 259200 |
| Host | TXT Record | TTL |
|---|
ns.ji-sedai.jp
TTL: 3600
Email address:
Serial: 1517806776
Refresh: 16384
Retry: 2048
Expire: 1048576
Minimum: 2560
Last tested: 05/03/2018
| Total Resources | 228 |
| Number of Hosts | 15 |
| Static Resources | 213 |
| JavaScript Resources | 29 |
| CSS Resources | 7 |
Last tested: 06/15/2019
| Total Resources | 58 |
| Number of Hosts | 10 |
| Static Resources | 49 |
| JavaScript Resources | 9 |
| CSS Resources | 3 |
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