bookwalker.jp

We performed a comprehensive analysis of bookwalker.jp on 2026-06-28. The website returned an HTTP 200 status code with a server response time of 12675ms. The page is served over HTTP/2 protocol with Gzip compression enabled, achieving approximately 60.0% size reduction. The total page weight is 1175 KB. Warning: The website does not have a valid SSL certificate. Visitors may see security warnings in their browser, and data transmitted to and from this website is not encrypted. The security headers analysis reveals a score of 15/100 (poor). The following security headers are properly configured: Referrer-Policy. However, the site is missing Content-Security-Policy, Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, 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 4 technologies across 3 categories powering bookwalker.jp. The detected stack includes Webpack, Vite, Google Tag Manager, and New Relic. Based on our comprehensive analysis of domain age, SSL configuration, email authentication, security headers, and blacklist status, bookwalker.jp receives an overall trust score of 59/100, classified as "Caution Advised".

After conducting a thorough safety and legitimacy analysis, bookwalker.jp receives a trust score of 59/100, which places it in the "Caution Advised" 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, SPF (Sender Policy Framework) email authentication preventing email spoofing, and DMARC email authentication with a quarantine 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), 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 bookwalker.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 bookwalker.jp and identified 4 distinct technologies across 3 categories. This analysis is performed by examining HTTP response headers, HTML source code patterns, JavaScript library fingerprints, CSS framework signatures, and DNS records. Build Tool: Webpack and Vite — bundles and optimizes the JavaScript and CSS assets for bookwalker.jp. Tag Manager: Google Tag Manager — manages marketing and analytics tags without code changes for bookwalker.jp. Monitoring: New Relic — monitors application performance and errors for bookwalker.jp. We also extracted the following tracking identifiers: Google Tag Manager container GTM-MW25QRX. These IDs can be used to identify other websites operated by the same organization.

bookwalker.jp delivers its homepage in 12675ms (server response time), which is considered slow by industry standards. The total page weight is 1175 KB, and we detected 1337 resource requests loading assets from 11 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. The website uses Gzip compression for text-based assets, achieving an estimated 60.0% reduction in transfer size. This reduces bandwidth usage and improves page load times, especially for visitors on slower connections. Asset minification status: 0 out of 5 CSS files and 1 out of 8 JavaScript files are minified. Minifying the remaining 12 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 bookwalker.jp produces approximately 0.57g of CO₂, earning a carbon rating of D. The website's carbon footprint could be reduced by optimizing images, enabling compression, reducing third-party scripts, and leveraging caching. For reference, the average web page produces about 0.5g of CO₂ per page view. The page weight of 1175 KB is the primary factor in this calculation. Core Web Vitals data from the Chrome User Experience Report (CrUX) is not available for bookwalker.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.

bookwalker.jp resolves to the IPv4 address 13.192.81.185, but does not support IPv6. IPv6 adoption is increasingly important as IPv4 address space becomes exhausted, and some ISPs and regions are transitioning to IPv6-only connectivity. The domain has 2 A record(s) configured. The domain name system is managed by 4 name servers: ns-1154.awsdns-16.org, ns-1830.awsdns-36.co.uk, ns-40.awsdns-05.com, and ns-937.awsdns-53.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 bookwalker.jp is handled by Google Workspace with 1 MX records configured: smtp.google.com. 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 quarantine policy — a moderate setting, directing unauthorized emails to spam/junk folders. 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 bookwalker.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 5 active subdomains for bookwalker.jp: blog.bookwalker.jp, developers.bookwalker.jp, help.bookwalker.jp, mail.bookwalker.jp, and www.bookwalker.jp. Active subdomains can reveal the organization's infrastructure, including development environments, API endpoints, and third-party service integrations.

The homepage of bookwalker.jp contains 1,645 words of visible text content. This is a substantial amount of content that provides good opportunities for search engine indexing. The page is structured with 23 H2 headings, 145 H3 headings, 0 H4 headings. The page includes 314 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 751 internal links pointing to other pages on the same domain and 165 external links pointing to third-party websites. The high number of internal links suggests a well-interconnected site structure, which helps search engines discover and crawl all pages efficiently. There are 8 external JavaScript files, 5 CSS stylesheets, and 1 iframes on the page. The site implements the following web standards and features: XML Sitemap (helps search engines discover all pages). Notable missing features: robots.txt and Schema.org structured data. Adding these could improve search engine discoverability and rich result eligibility. The website has social media presence across 2 platforms: Twitter (@BOOK_WALKER) and Github (@newrelic). An active social media presence is a positive trust indicator and helps build brand awareness and customer engagement.

The title tag for bookwalker.jp is well-optimized at 42 characters: "無料試し読みなら電子書籍ストア - ブックウォーカー ( BOOK WALKER )". The length falls within the ideal range for Google search results, ensuring the full title is displayed without truncation. The meta description is 81 characters (well-optimized): "最新作から完結・名作・話題作まで毎日更新。無料・試し読み多数。BOOK WALKERならマンガ・ラノベ・BL・TLなど国内最大級の品ぞろえ。初回購入50%還元中！". 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 canonical url is correctly set to https://bookwalker.jp/, preventing duplicate content issues, the page language is declared as ja, and a favicon is configured. Open Graph meta tags are configured with 1/4 recommended fields: OG image (social sharing thumbnail), These tags control how the page appears when shared on Facebook, LinkedIn, and other social media platforms that support the Open Graph protocol. A Twitter Card of type summary_large_image is configured, which controls how links appear when shared on Twitter/X. The "summary_large_image" type displays a large image preview, which typically generates higher engagement rates than the basic card type. The meta keywords tag contains 3 terms including 電子書籍, BOOK WALKER, and ブックウォーカー. Note: Google has officially confirmed that it does not use the meta keywords tag as a ranking signal. However, some other search engines (Bing, Yandex) may still reference it.