The latest articles on DEV Community by Masaya Hori (@messiah). https://dev.to/messiah https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3713435%2F7a20b01e-5f87-4a2d-8513-45f8d02c9ec2.png https://dev.to/messiah en Masaya Hori Sat, 23 May 2026 06:29:54 +0000 https://dev.to/messiah/accounting-made-simple-ai-powered-financial-insights-of-japanese-companies-with-gemma-4-5akj https://dev.to/messiah/accounting-made-simple-ai-powered-financial-insights-of-japanese-companies-with-gemma-4-5akj <p><em>This is a submission for the <a href="https://dev.to/challenges/google-gemma-2026-05-06">Gemma 4 Challenge: Build with Gemma 4</a></em></p> <h2> What I Built </h2> <p>Accounting Made Simple is a modern and very simple, work in progress, financial web app that helps users track organisations and evaluate the core financial data. It combines financial data sources (EDINET, J-Quants and Finnhub) with Gemini-powered AI analysis to give users quick insights into a company’s financial health, trends, and potential red flags.</p> <p>Key capabilities:</p> <ul> <li>Organisation search and equity data lookup</li> <li>Financial analysis generated by Gemma 4 from real balance sheet data</li> <li>Responsive UI built with Next.js 16, React 19, Tailwind CSS, and shadcn-inspired components</li> </ul> <h2> Demo </h2> <div class="crayons-card c-embed text-styles text-styles--secondary"> <div class="c-embed__content"> <div class="c-embed__body flex items-center justify-between"> <a href="https://accountingmadesimple.vercel.app/" rel="noopener noreferrer" class="c-link fw-bold flex items-center"> <span class="mr-2">accountingmadesimple.vercel.app</span> </a> </div> </div> </div> <h2> Code </h2> <div class="ltag-github-readme-tag"> <div class="readme-overview"> <h2> <img src="https://assets.dev.to/assets/github-logo-5a155e1f9a670af7944dd5e12375bc76ed542ea80224905ecaf878b9157cdefc.svg" alt="GitHub logo"> <a href="https://github.com/MessiahHoly" rel="noopener noreferrer"> MessiahHoly </a> / <a href="https://github.com/MessiahHoly/accounting-made-simple" rel="noopener noreferrer"> accounting-made-simple </a> </h2> <h3> </h3> </div> <div class="ltag-github-body"> <div id="readme" class="md"><div class="markdown-heading"> <h1 class="heading-element">Accounting Made Simple</h1> </div> <p>A modern and simple web app for searching organisations, reviewing equity and filing data, and generating AI-powered financial insights. It combines J-Quants company search for Japanese companies, EDINET/Finnhub financial filings, and Gemini-powered analysis to help you explore financial health and accounting equation context.</p> <p>Built with:</p> <ul> <li>Next.js 16 + React 19</li> <li>Tailwind CSS v4 and shadcn/ui-inspired components</li> <li>Prisma 7 + PostgreSQL</li> <li>Better Auth with magic link login and Resend email delivery</li> <li>EDINET, J-Quants, and Finnhub financial data sources</li> <li>Gemini / Google GenAI-powered financial analysis and insights</li> <li>Zod / Prisma Zod generator for typed schema validation</li> <li>Recharts for simple financial charts</li> </ul> <div class="markdown-heading"> <h2 class="heading-element">Features</h2> </div> <ul> <li>Search Japanese organisations and equity data from J-Quants</li> <li>Optional language selector for search and AI analysis results</li> <li>Company detail pages showing EDINET/Finnhub financial filings, charts, and accounting summaries</li> <li>AI-generated financial analysis from Gemini / Google GenAI</li> <li>Responsive, utility-first UI with custom components</li> </ul> <div class="markdown-heading"> <h2 class="heading-element">Getting Started</h2> </div> <div class="markdown-heading"> <h3 class="heading-element">1. Clone the</h3>…</div></div> </div> <div class="gh-btn-container"><a class="gh-btn" href="https://github.com/MessiahHoly/accounting-made-simple" rel="noopener noreferrer">View on GitHub</a></div> </div> <h2> How I Used Gemma 4 </h2> <p>I used Gemma 4 via the Google GenAI SDK to power the financial analysis experience.</p> <ul> <li>Model used: gemma-4-31b-it</li> <li>Reason: I chose the 31B Dense variant because it provides strong instruction-following and financial reasoning for structured company balance sheet data, while still being efficient enough for a production-style analysis flow.</li> <li>Role in the app: Gemma 4 reads balance sheet/financial data fetched from EDINET/J-Quants/Finnhub, then generates plain-language insights about company health, trends, and risk signals that are rendered directly in the UI.</li> <li>This makes the app more than an accounting tracker — it becomes a finance assistant that helps users understand what the numbers mean.</li> </ul> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F49fzaucjq9auzfe6rzxq.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F49fzaucjq9auzfe6rzxq.png" alt=" " width="800" height="800"></a></p> devchallenge gemmachallenge gemma