AI Douga Lab

AI Douga Lab (AI動画ラボ) is an independent, Japanese-language review site dedicated to AI video generation tools. It exists to answer one question Japanese users keep asking: "which AI video tool is actually worth paying for, and how much does it really cost?" The site's method is hands-on verification. For each tool the operator actually creates an account, pays, and generates videos, then documents the results with screenshots. Every price is confirmed on the vendor's official page and stamped with the confirmation date, because AI tool pricing changes fast. A signature feature is the "real unit price" (実質単価) calculation: most AI video services use credit systems where the headline monthly price does not match the true cost per finished video, so each review breaks down the actual yen-per-video figure and finds the break-even point between plans. Coverage includes 19+ in-depth reviews and comparisons: individual tool reviews (PixVerse, Runway Gen-4, Kling, Hailuo, DomoAI, Pollo AI, Vidnoz, Magic Hour, Canva), use-case comparison hubs (best free tiers, image-to-video, commercial-use licensing, credit-system pitfalls), and honest "who it's for / who it's not for" verdicts. Editorial ranking and recommendations are independent of affiliate compensation, and tools with no affiliate program are reviewed by the same standard. The target reader is a Japanese content creator, marketer, or EC seller evaluating AI video tools and trying to avoid overpaying for credits they will not use.