"I have a TOEIC score over 800 and can handle daily conversation. But in meetings with native speakers, I can't join the discussion."
"I want to earn the trust of my subordinates and clients with more sophisticated language."
High-achieving professionals often face this kind of 'intermediate plateau' (stagnation at CEFR B1–B2).
For learners at this stage, which learning environment is the best choice to elevate their English to the next level (C1: Executive Level)?
The market is flooded with 'budget online English lessons,' 'English coaching,' and 'private native tutoring,' but the 'right answer' depends on your current level.
In this article, we will thoroughly compare these three options from the perspective of 'business return on investment (ROI)' and suggest the best path for intermediate to advanced learners.
Option 1: Budget Online English Lessons
Conclusion: A 'gym' for securing a high 'quantity' of casual English exposure. However, don't expect 'business quality.'
These services offer daily lessons for around ¥6,000 to ¥10,000 per month (e.g., DMM Eikaiwa, RareJob, NativeCamp).
Pros
- Outstanding Cost-Performance and Quantity: Ideal for building a daily habit of speaking English.
- Low Psychological Barrier: Easy to book and cancel, making it convenient to use during short breaks in a busy schedule.
Critical Drawbacks for Business Professionals
When intermediate to advanced learners use these services for business purposes, they face the following 'structural limitations.'
- Lack of 'Business Literacy' Among Tutors
Many tutors are students or part-timers, reportedly earning only a few hundred yen per hour. When you try to discuss advanced topics like M&A, supply chains, or legal risks, the conversation can't go deep because of a lack of shared background knowledge.
- Pronunciation and Accent Barriers
Tutors tend to be from the Philippines or other non-native English-speaking countries. While their English proficiency is high, if you're competing in a global business environment, not being accustomed to 'standard native pronunciation and speed' poses a risk of not understanding what's said in actual meetings.
- The Risk of 'Fossilization'
They are excellent as 'conversation partners' but are not 'professional English teachers (with qualifications).' Because the focus is on 'getting the meaning across,' grammatical mistakes and unnatural collocations (word combinations) go uncorrected, leading to the 'fossilization' of incorrect English.
Option 2: High-Priced English Coaching
Conclusion: The most powerful boost for beginners (CEFR: up to A2). Highly likely to be a 'mismatch' for intermediate and above (CEFR: B1+).
These are services where a Japanese consultant manages your learning for ¥150,000 to ¥200,000 per month (e.g., PROGRIT, RIZAP ENGLISH).
Pros
- Forced Study Habits: Your 'three hours of daily study' is managed, making it highly effective for those who tend to procrastinate.
- Thorough Grounding in Fundamentals: Involves a large volume of 'drills' like vocabulary memorization and shadowing, making it ideal for beginners without a solid foundation to quickly raise their TOEIC scores.
The 'Disconnect' for Business Professionals
If you can already 'speak some English (CEFR B1 or higher),' coaching may offer poor return on investment.
- It's the Wrong Phase
The main focus of coaching is 'managing input.' However, what intermediate and advanced learners need is 'brushing up on advanced output'—specifically, 'how to refine the words you already know' and 'how to use subtle nuances correctly.' This cannot be acquired through managed self-study drills.
- It's Not 'Real-World' English
Many coaching schools rely on commercial textbooks and standardized training. They tend to lack the flexibility to address specific, real-life business challenges like, 'this situation in a recent meeting where I couldn't express myself well.' In fact, some users complain that they 'paid a lot of money but had few opportunities for conversation practice.'
Is English Coaching 'Pointless'? A Scientific Analysis Based on SLA (Second Language Acquisition) and Psychological Data
Option 3: Private Lessons with a Native Tutor
Conclusion: The 'optimal solution' for intermediate and advanced learners (CEFR B1+). Achieve 'trusted English' with feedback from a professional.
This is a one-on-one learning style with a native tutor, costing between ¥7,000 and ¥10,000 per hour.
For high-achieving professionals who can handle daily conversation but want to achieve results in business, this style is the most suitable.
Why Do Intermediate and Advanced Learners Need a 'Native Professional'?
- Misusing 'Nuance' Damages Trust
In business, the difference between 'I want to...' and 'I would like to...' or the choice between 'problem' and 'issue' can dramatically change the impression you give (of your intelligence and professionalism).
Only a qualified native tutor can point out this kind of English that is 'grammatically correct but inappropriate for the situation.'
- They Understand Business Context
A native tutor with business experience can conduct role-plays tailored to your job function and industry.
However, Choosing the Wrong School Halves the Effect
It's not a matter of 'any native speaker will do.' Major schools have the following 'structural differences.'
Berlitz / GABA
- Features: Well-known, large-scale schools.
- Tutors: Many tutors are 'native-level,' which may include those from non-English speaking countries.
- Drawbacks: The 'Tutor Lottery' and Non-Dedicated Tutors
Many large schools use a system where the tutor changes for each lesson. This leads to inefficiencies like starting with self-introductions every time and the problem of 'weaknesses pointed out previously' not being carried over.
Furthermore, tutor quality can be inconsistent, with online reviews often mentioning that 'it's hit-or-miss' or 'they just read from the textbook.'
ELT Eikaiwa
- Features: A London-founded school with 40 years of history, specializing in 'professionals.'
- Tutors: Employs only 'professional English instructors' who are 100% native speakers (mainly British) and hold qualifications like the Cambridge University CELTA/DELTA or a Master's degree.
- Dedicated Tutor System: Adopts a 'fully dedicated tutor system.' The most suitable tutor is assigned based on the student's background (e.g., finance, IT, law), and that same tutor provides continuous, responsible instruction. This enables 'cumulative' learning without wasting time.
- Curriculum: Not textbook-driven. It is custom-designed to address the 'specific challenges' the student wants to solve.
Conclusion: Choose Your Investment Based on Your 'Stage'
The service you should choose is clear, depending on your current level and goals.
Current Situation | Recommended Choice | Reason |
English Beginner (A1-A2) | English Coaching | First, you need to drill basic vocabulary and phrases into your memory through a structured, mandatory system. |
Hobby / Travel Purposes | Budget Online English Lessons | Even if the quality is low, you can build confidence by getting a lot of practice. |
Intermediate-Advanced Business User (B1+) | ELT Eikaiwa | Needs correction of incorrect English, mastery of nuance, and dialogue in a business context. |
The Choice for High-Achieving Professionals is 'ELT Eikaiwa'
If you are looking to advance your career with your 'English ability,' then 'lessons with a dedicated, qualified native tutor' is the choice with the highest return on investment (ROI).
At ELT Eikaiwa, our native tutors come from diverse professional backgrounds, including consultants, finance professionals, and university professors.
Why not go beyond simple English conversation and develop your 'English communication strategy for business success' with professionals from London?
First, Assess Your Level with a 'Trial Lesson'
ELT Eikaiwa offers trial lessons with a Japanese counselor and a native tutor.
We will accurately assess your current English level (CEFR) and propose the shortest path to your goals.


