skillstack.jp

What It Is

SkillStack is a Japanese-language learning app for IT certification exams, available on Web, iOS, and Android. It is not a traditional live-class or recorded-course platform; instead, it is a self-study tool centered on question bank practice, mock exams, flashcards, learning analytics, and AI-assisted analysis. The site places particular emphasis on AWS certification study, with plans to cover 12 AWS certifications from Foundational to Specialty. CLF Cloud Practitioner and AIF AI Practitioner are marked as completely free.

Core Features and Course Coverage

In terms of course categories, SkillStack covers AWS certifications and also lists other IT qualifications such as IT Passport, IPA Applied Information Technology Engineer, and LinuC Level 1–2. The page also mentions areas such as Fundamental Information Technology Engineer and Cisco. As for teaching format, there is no information about live classes, recorded lessons, or 1-on-1 tutoring; the focus is mainly on Q&A-style practice, mock exams, flashcards, and review functions. Its AI features include answer-pattern analysis, organizing weak areas by domain and root cause, study-priority suggestions, post-question learning advice, and AI grading for written-response questions. However, the terms also clearly state that AI-generated content is not guaranteed to be accurate, complete, or up to date, so it is better treated as supplementary feedback rather than an authoritative source of answers.

Pricing and Payment

The pricing structure is straightforward: the free plan includes 20 sample questions for each qualification, 5 AI Credits per month (10 in the first month), learning statistics, and review features. The monthly plan costs ¥980/month and unlocks the full question banks for all qualifications, mock exams, flashcards, and AI grading for written responses, with 80 AI Credits per month. The annual plan costs ¥9,800/year, includes 100 AI Credits per month, and offers an approximately 17% discount. Additional AI Credit packs range from ¥300 to ¥1,980. Web payments are handled through Stripe, while iOS/Android payments go through Apple and Google. Subscriptions can be canceled at any time, but there are no prorated refunds, and point packs are generally non-refundable.

Pros, Cons, and Who It’s For

The advantages are a low barrier to entry, relatively comprehensive AWS coverage, a clear mobile-first experience for short study sessions, and AI weakness analysis that can help self-learners identify revision priorities. The downsides are that SkillStack does not disclose instructors, question bank sources, or its academic review process, nor does it state that it issues any course certificates. The service is designed to support exam preparation and does not guarantee passing an exam. It is suitable for AWS or IT certification candidates who can study in Japanese and prefer preparation driven by question practice and mock exams, especially for commuting and short review sessions.

Access from China and Alternatives

The page does not provide information about mainland China access, payment availability, or Chinese-language support. Since the service involves Stripe, Apple, Google Play, and external AI APIs, the actual network and payment experience may be uncertain, so china_access can only be rated as unknown. If you need Chinese-language courses or local payment options, you may want to compare Udemy, Coursera, AWS Skill Builder, Whizlabs, Tutorials Dojo, as well as certification courses from domestic cloud vendors or training platforms.