onecareer.jp

We performed a comprehensive analysis of onecareer.jp on 2026-06-29. The website returned an HTTP 200 status code with a server response time of 27353ms. The page is served over HTTP/2 protocol, however no compression (Gzip or Brotli) is enabled, which means the page is transferred at its full uncompressed size. The total page weight is 152 KB. The website uses a secure HTTPS connection with a valid SSL certificate issued by Amazon (DV type). The connection is encrypted using TLS 1.2 with the ECDHE-RSA-AES128-GCM-SHA256 cipher suite and sha256WithRSAEncryption signature algorithm. The certificate covers 4 domain(s) (Subject Alternative Names) and expires on 2026-11-06, which is 130 days from now. The security headers analysis reveals a score of 0/100 (poor). No security headers are configured, which is a significant security concern. However, the site is missing Content-Security-Policy, Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, which could expose the site and its users to cross-site scripting (XSS), clickjacking, and other web-based attacks. Our technology detection scan identified 6 technologies across 5 categories powering onecareer.jp. The detected stack includes Next.js, Nuxt.js, React, Google Tag Manager, Sentry, and Google Fonts. The site uses Next.js as its primary framework. The UI is built with React. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, onecareer.jp receives an overall trust score of 66/100, classified as "Likely Safe".

After conducting a thorough safety and legitimacy analysis, onecareer.jp receives a trust score of 66/100, which places it in the "Likely Safe" category. This score is calculated by evaluating multiple factors including SSL certificate validity, domain registration history, email authentication protocols, security header configuration, and blacklist status across major threat intelligence databases. The analysis identified several positive trust signals: a valid HTTPS connection protecting data in transit, a valid SSL certificate issued by Amazon with 130 days until expiration, SPF (Sender Policy Framework) email authentication preventing email spoofing, and DMARC email authentication with a none policy. Areas of concern include: the absence of a Content-Security-Policy header, which leaves the site more vulnerable to cross-site scripting (XSS) attacks, no X-Frame-Options header, which could allow the site to be embedded in malicious iframes (clickjacking), missing Referrer-Policy, potentially leaking URL information to third parties, the domain's WHOIS information is hidden behind a privacy service, making it harder to verify the owner's identity, and DNSSEC is not enabled, leaving DNS queries vulnerable to spoofing attacks. While these issues don't necessarily indicate malicious intent, they represent areas where the website's security posture could be improved. We checked onecareer.jp against 8 major blacklist databases including Google Safe Browsing, Phishtank, Urlhaus, Openphish, Dnsfilter, Spamhaus Dbl, Surbl, and Virustotal. The domain passed all 8 checks with a clean status, meaning it has not been flagged for phishing, malware distribution, spam, or other malicious activities by any of the tested threat intelligence providers.

Our technology detection engine scanned onecareer.jp and identified 6 distinct technologies across 5 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. Framework: Next.js and Nuxt.js — provides the application framework and routing for onecareer.jp. UI Library: React — handles the user interface rendering and component management for onecareer.jp. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for onecareer.jp. Monitoring: Sentry — monitors application performance and errors for onecareer.jp. Fonts: Google Fonts — delivers web fonts for typography for onecareer.jp. We also extracted the following tracking identifiers: Google Tag Manager container GTM-5K36C4. These IDs can be used to identify other websites operated by the same organization.

onecareer.jp delivers its homepage in 27353ms (server response time), which is considered slow by industry standards. The total page weight is 152 KB, and we detected 179 resource requests loading assets from 6 third-party domains. A high number of third-party domains can significantly impact page load time due to additional DNS lookups and TLS handshakes required for each domain. No compression is currently enabled on onecareer.jp. Enabling Brotli or Gzip compression could reduce page size by 60-80% for text-based assets (HTML, CSS, JavaScript), significantly improving load times and reducing bandwidth costs. This is one of the simplest and most impactful performance optimizations available. Asset minification status: 0 out of 3 CSS files and 0 out of 2 JavaScript files are minified. Minifying the remaining 5 unminified file(s) could further reduce page weight by 10-30% for those assets. Minification is a best practice that reduces download sizes without affecting functionality. From an environmental perspective, each page view of onecareer.jp produces approximately 0.07g of CO₂, earning a carbon rating of A. This places the website among the cleanest on the web, demonstrating efficient use of server resources and optimized content delivery. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 152 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for onecareer.jp. This typically means the site doesn't have enough real-world Chrome user traffic to generate statistically significant field data, or the domain is not included in the CrUX dataset. Core Web Vitals (LCP, INP, CLS) are important Google ranking factors that measure real user experience.

onecareer.jp resolves to the IPv4 address 13.112.148.179 and also supports IPv6 (2406:da14:af1:ac82:97d:8726:3e31:bdcf), demonstrating modern network infrastructure readiness. The domain has 3 A record(s) configured. The domain name system is managed by 4 name servers: ns-1129.awsdns-13.org, ns-2043.awsdns-63.co.uk, ns-27.awsdns-03.com, and ns-932.awsdns-52.net. Having 4 name servers provides good redundancy — if one fails, the others can continue serving DNS queries. The choice of name servers often indicates the DNS hosting provider or CDN service being used. Email for onecareer.jp is handled by Google Workspace with 5 MX records configured: aspmx.l.google.com, alt1.aspmx.l.google.com, and alt2.aspmx.l.google.com and 2 more. Multiple MX records provide failover redundancy — if the primary mail server is unavailable, email will be routed to the next available server. SPF (Sender Policy Framework) is configured, which specifies which mail servers are authorized to send email on behalf of this domain. This helps prevent email spoofing and improves email deliverability. DMARC (Domain-based Message Authentication, Reporting and Conformance) is configured with a none policy — a monitoring-only setting that doesn't enforce any action on unauthorized emails. DKIM was not detected. Without DKIM, recipients cannot cryptographically verify that emails claiming to be from this domain are authentic. DNSSEC is not enabled for onecareer.jp. While not critical for most websites, DNSSEC adds an important security layer by ensuring DNS responses haven't been tampered with during transit. Enabling DNSSEC is recommended for domains handling sensitive data or financial transactions. Our subdomain enumeration scan discovered 1 active subdomains for onecareer.jp: www.onecareer.jp. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

The homepage of onecareer.jp contains 122 words of visible text content. This is a relatively short page — adding more descriptive content could improve search engine visibility. The page is structured with 6 H2 headings, 1 H3 headings, 0 H4 headings. The page includes 14 images. All images have proper alt text attributes ✓, which is excellent for both accessibility (screen readers) and SEO (search engines can understand image content). The link structure consists of 3 internal links pointing to other pages on the same domain and 87 external links pointing to third-party websites. There are 2 external JavaScript files, 3 CSS stylesheets, and 0 iframes on the page. The site implements the following web standards and features: robots.txt (controls search engine crawling behavior) and Schema.org structured data (WebSite). Notable missing features: XML Sitemap. Adding these could improve search engine discoverability and rich result eligibility.

The title tag for onecareer.jp is well-optimized at 34 characters: "就活サイト【ワンキャリア】インターンシップや新卒の就職活動情報が満載". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 118 characters (well-optimized): "はじめてのキャリアを選ぶ、就活サイト【ワンキャリア】本選考・インターンシップ選考のES・面接・GD対策や自己分析のコツ、インターン等の就活イベントのクチコミ、説明会のスケジュール、業界・企業研究コラムまでが揃う、就職活動サイトの新定番！". Google typically displays up to 155-160 characters of the meta description in search results. A compelling meta description with a clear call-to-action can significantly improve click-through rates from search results. The page language is declared as ja and a favicon is configured. No Open Graph tags are configured. When someone shares a link to onecareer.jp on social media, the platform will have to guess the title, description, and image — often producing unattractive or inaccurate previews. Adding OG tags is essential for social media marketing. The site implements Schema.org structured data with the following types: WebSite. Structured data helps search engines understand the page content and can enable rich results (featured snippets, knowledge panels, star ratings) in Google search results, which can significantly increase click-through rates.