New Book: LINE as 'Business Infrastructure', Not Just a 'Delivery Tool' - Strengthening Companies in 4 Areas: Acquisition, Sales, Efficiency, and Recruitment

[Ranked #1 on Amazon's Best Sellers List! (General Marketing & Sales Books Category / As of May 25, 2026)]

LINE is the only media platform that Japanese people open every day. A new textbook authored by a LINE expert who has managed over 300 accounts and accompanied more than 100 companies will be released on Friday, May 29, revealing how to master this 'ultimate marketing tool' for building long-term customer relationships.

Bookdam Inc. (Headquarters: Toshima-ku, Tokyo, CEO: Naki Kikuchi) will release the new book 'The Textbook for Strengthening Your Company with LINE Management: Achieving Results in as Little as 3 Months' (Author: Seigo Nakagawa, CEO of BALSA Inc.) on May 29, 2026.

The author, Seigo Nakagawa, has spent over 11,000 hours over the past five years actively managing LINE accounts on the front lines for over 100 businesses. In this book, the author systemizes the real-world know-how he has utilized across diverse industries—ranging from personal gyms and dental clinics to SaaS tools, real estate, and sports teams. This book directly addresses the long-standing challenge of LINE marketing: the overwhelming lack of referenceable case studies. It is a must-read for business owners, marketers, and business managers who want to turn LINE into an engine for company growth.

Key Points of the Book:

1. Obtain a 'Blueprint for LINE Marketing' applicable across all industries.
A universal operational framework that can be applied to any sector, explained clearly with illustrations.

2. Comprehensive steps to 'achieve results in just 3 months.'
Revealing the steps from introduction to advanced usage, ensuring even beginners won't get lost.

3. A collection of know-how across multiple industries solving business challenges with LINE.
Introducing successful case studies of companies that utilized LINE to solve specific problems.

4. Understand 'how to measure and present ROI,' eliminating the obscurity of results.
Includes a chapter dedicated to addressing the concerns of executives and managers, carefully explaining the design of metrics for measuring the effectiveness of LINE campaigns and internal reporting.

5. Acquire the mindset to utilize LINE to its fullest.
Going beyond mere tool explanations to delve into the essence of building long-term relationships with customers.

Why Do Companies Need LINE Now?

The primary source of information gathering has shifted from TV and newspapers to social media and smartphones, rendering one-way corporate broadcasting ineffective. Consumers now receive information from sources they choose, at their own timing. Companies that fail to adapt to this change cannot reach their customers, regardless of how good their products are.

Furthermore, the customer decision-making process has become complex. It is not uncommon for it to take weeks or months from discovering a product on social media to reading reviews, comparing prices, and finally making a purchase. With an explosive increase in information, a product that once caught a customer's eye is easily overwritten by new information. In an environment where paid ads often just place you side-by-side with competitors, maintaining ongoing touchpoints with customers who have shown initial interest has become the most critical challenge for businesses.

By utilizing LINE, companies can regularly deliver the information customers seek—such as differences from competitors, product appeal, recommended menus, limited-time coupons, and news about events or new offerings.

Solving Industry-Specific Challenges with LINE

If even one of these challenges applies to you, LINE might be the solution. This book introduces success stories of companies that solved their issues using LINE, categorized by specific challenges.

[Table of Contents Overview]
Introduction
Chapter 1: Why Does LINE Strengthen a Company?
- An era where every company naturally uses LINE
- Why companies need LINE now
- The essence of LINE management that grows a company
- LINE communication demanded by society
- Creating an era where good companies grow naturally
Column: Companies that want to accelerate growth must leverage!

Chapter 2: Acquisition, Conversions, Efficiency, Recruitment - LINE is Effective for All!
- Strengthening new customer acquisition with funnel design combining SNS, ads, and flyers (Achieved 500-600 monthly LINE registrations)
- LINE automatically sorting 'Visit now?' vs 'Wait and see?' (557 registrations, 67 visits within 2 months of release)
- Broadcasting 'what cannot be said on SNS' via LINE (2,700 friends added in 1 month)
- 3,000 monthly bookings, over 90% via LINE
- How 'THE ROOM TOUR' real estate media grew fans on LINE leading to book sales
- Making offers immediately upon registration; sending reminders with the representative's face