Launch of 5-Book Series Systematizing Store Marketing Fields; Sequential Release Starts April 30 and May 29

SHINKA Inc. (Headquarters: Yokohama, Kanagawa; CEO: Yukie Oda) will release a series of five books for retail and salon operators, produced by Director Sayo Tanaka, sequentially on April 30 and May 29, 2026.

This series is a systematic guide to learning five essential methods for modern store marketing: Instagram, Meta Ads, MEO (Map Engine Optimization), LINE, and LLMO (Large Language Model Optimization), each dedicated to one volume.

Background: Growing Marketing Methods and the Difficulty of Optimization With the rapid increase in digital marketing channels—SNS, web ads, Google Maps, LINE customer management, and now AI search—many store owners face challenges such as not knowing which method fits their store, struggling to prioritize within limited time, and failing to see results from partial efforts.

For many owners, balancing marketing with daily operations like inventory and service is difficult. As a result, valuable products and services often go unnoticed. This series aims to solve these issues by providing a way to choose and implement the right marketing methods reasonably.

Features of the Series The series divides necessary store marketing elements into five areas, each authored by an expert: - Specialized focus on one theme per book - Step-by-step format for beginners - Solves individual challenges with one book, or covers the entire marketing funnel with all five

Beyond just know-how, the books explain the decision-making criteria for which measures to adopt and in what order, helping readers build practical skills to convert marketing into sales.

Book Lineup [Releasing April 30, 2026] - Instagram Marketing & Promotion Textbook for Stores and Salons: Introductory & Utilization Guide to Getting Results from Zero! - LLMO Marketing & Promotion Textbook for Stores and Salons: Introductory & Utilization Guide to Getting Results from Zero!

[Scheduled for May 29, 2026] - Meta Ads Marketing & Promotion Textbook for Stores and Salons - Official LINE Marketing & Promotion Textbook for Stores and Salons - MEO Marketing & Promotion Textbook for Stores and Salons

Price: 2,200 JPY (tax included) each Available at: Amazon and bookstores nationwide

Author Profiles Five experts with proven track records in their respective fields have authored this series:

- Instagram: Yoshie Yamashita (CEO, epice planning Co., Ltd.) - Meta Ads: Yukie Oda (CEO, Y's Escort Co., Ltd. & SHINKA Inc.) - LINE Official Account: Asuka Noda (Leader, kiramama☆Project) - MEO & Review Marketing: Chiaki Matsumoto (Kampo Pharmacist / Consultant) - AI & LLMO Marketing: Sayo Tanaka (CEO, NS-PROJECT Co., Ltd. & Director, SHINKA Inc.)

Future Developments Following the book releases, SHINKA plans to roll out limited content for readers and initiatives to support practical implementation.

Company Profile Company Name: SHINKA Inc.