Advertising in Japan: Google, the New LY Ads, and What Actually Works (2026)

Paid advertising is the fastest way for a foreign company to test Japanese demand — and one of the easiest places to waste money by importing assumptions. Japan’s ad market runs on a different platform map than the West, and that map was just redrawn: on April 1, 2026, LY Corporation launched LY Ads, merging LINE Ads and Yahoo! JAPAN’s display advertising into a single platform — the biggest structural change to Japanese digital advertising in years, and one most English-language guides haven’t caught up with.

This guide maps the paid landscape as it stands in 2026: what LY Ads is, where Google fits, what each channel is good for, realistic costs, and a testing sequence for foreign entrants. Platform terms are as published in August 2026 and change; verify current specifics before budgeting.

The Market in Numbers

Per Dentsu’s annual survey, Japan’s total advertising spend hit a record ¥8.06 trillion in 2025, with internet advertising growing 10.8% to ¥4.05 trillion — crossing half of total ad spend for the first time. Video advertising grew 21.8%. For a foreign advertiser the takeaway is simple: digital inventory in Japan is deep, liquid and still growing, and the auction dynamics reward advertisers who do native-language keyword and creative work that most foreign competitors skip.

The 2026 Platform Map

Google Ads: the demand-capture workhorse

Google handles the majority of Japanese search (roughly 60–75% in recent StatCounter data), and Google Ads works in Japan exactly as it does elsewhere — same auction, same tooling, Japanese-language campaigns. It is the right first channel for almost every foreign entrant because it captures existing demand and produces decision-grade data fast. The catch is the language layer: keyword research must be done natively across kanji, katakana and hiragana variants (see Japanese SEO — the scripts problem applies to paid keywords identically), and ads/landing pages must be native-quality Japanese.

LY Ads: the unified Yahoo! JAPAN + LINE platform

What changed: LY Corporation consolidated LINE Ads (including Talk Head View) and Yahoo! JAPAN Ads Display Ads (Auction and Guaranteed) into LY Ads Display Ads, launched April 1, 2026. Legacy LINE Ads stops ad delivery around late October 2026; existing LINE Ads accounts migrate via a tool or manually. Yahoo! JAPAN Ads Search Ads was renamed LY Ads Search Ads with no migration needed.

What this means in practice:

• One buy, two ecosystems. A single display campaign can now reach LINE’s surfaces (used by ~100 million people monthly) and Yahoo! JAPAN’s portal, news and mail inventory — together covering demographics that Meta and Google Display reach thinly in Japan, including older and regional users.
• Unified data, better optimization. Consolidated delivery data improves the platform’s machine learning — LY Corporation’s stated rationale for the merge.
• Search stays separate from display. LY Ads Search Ads (the former Yahoo! search ads) remains the second search auction in Japan; because Yahoo! JAPAN’s organic results are Google-powered but its paid search is its own auction, some advertisers find cheaper clicks there, especially in finance, insurance and older-skewing categories.
• If you read a guide that says “run LINE Ads” or “run Yahoo! JAPAN Display Ads” as separate platforms, it predates April 2026.

Social platforms: supporting roles

• X (Twitter) — far stronger in Japan than in the West; hashtag and present-campaign mechanics work for B2C awareness.
• Meta (Instagram/Facebook) — Instagram matters for lifestyle/beauty/food; Facebook is marginal in Japan.
• TikTok — growing, youth-skewed.
• YouTube — bought through Google Ads; the practical entry into Japan’s fast-growing video ad spend.
• LinkedIn — weak in Japan; B2B budgets are better spent on search, content and industry media (see Digital Marketing in Japan).

What Japanese Ad Creative Requires

• Information density over minimalism. Japanese display and landing creative typically carries more text, specifics and proof points than Western equivalents — and outperforms minimalist imports.
• Soft claims, hard evidence. Superlatives (“No.1”, “best”) require substantiation under Japanese advertising practice and consumer expectations; unverifiable bravado depresses conversion and can create compliance risk.
• Trust signals in the ad path. Company name, established-in dates, certifications and Japanese support availability belong on the landing page — Japanese buyers check before converting (see Japanese Localization).
• Native copywriting, not translation. Ad character limits interact badly with translated English copy; write Japanese ads in Japanese from the start.

Costs and Expectations

• CPCs in many Japanese B2B/SaaS niches run below US equivalents in dollar terms, partly because fewer foreign advertisers bid on well-researched Japanese long-tail terms. Competitive consumer categories (finance, beauty) are as expensive as anywhere.
• Conversion lag is structural. Japanese buyers click, research, and return via branded search days later — judge channels on 60–90-day assisted conversions, not last-click ROAS in week one.
• Self-serve is open. Google Ads and LY Ads both offer self-serve accounts; agency minimums are a choice, not a requirement. A serious first test on Google Search in a B2B niche can start at a few thousand dollars a month.

A Testing Sequence for Foreign Entrants

1. Months 1–2: Google Search only. Native keyword research, tightly themed campaigns on high-intent terms, localized landing pages. Goal: cost per qualified Japanese lead/sale versus home market.
2. Months 2–4: extend what works. Add YouTube (via Google) if video assets exist; add LY Ads Search if your category skews older or Google CPCs run hot.
3. Months 4+: reach and retention. Add LY Ads Display — including friend-acquisition campaigns for your LINE Official Account (see LINE Marketing in Japan), which convert paid reach into an owned retention channel.
4. Ongoing: shift budget quarterly by qualified-lead cost; feed search-term data back into your SEO and content plan — paid and organic share one keyword reality.

Where to Go Next

Paid is one layer of the mix: Marketing in Japan for the strategy, Digital Marketing in Japan for channel budgets, LINE Marketing in Japan for the retention channel your display spend should feed, and Japanese SEO for the organic engine that compounds while ads run.