April 28th, 2021 revised to Section 2.6. Control the Return Directions.
March 3rd, 2021 revised to "KOMA's table tennis is dynamics Ver3.0".
The study and solutions examined were moved to more closely related departments. The research and solutions examined were moved to more closely related departments. A new part 4 " Think Tactics according to Vectors (Service)" was set up to collect service-related articles. The outline of each section is summarized at the beginning of each part.
January 8th, 2021 upped Section 2.4. Make a Drive against the Cut. Changed Section 4.2. Rubber Type and Angular Momentum. Changed the way of receiving "opinions and impressions" to Twitter.
December 25th, 2020 revised to "Koma-san's Table Tennis is a Dynamics Ver. 2.7" for CSS review and Section number.
December 9th, 2020 upped Section 5.2.1.3. Direct Bang the Cut.
October 21th, 2020 upped Section 1.9.4. Relation between Racket Swing and Flight Distance.
July 10th, 2020 upped Section 2.8. The Basis of Drive Spin Rallies.
Jun 12th, 2020 upped Section 6.6. The Basis of Back-spin Rally .
April 27st, 2020 The parent title is described in each title. Screen adjustment of smartphone display.
April 22st, 2020 upped Section1.8. The Basic of Swing.
March 31st, 2020 upped Section 6.5. Bird's-eye View of the Whole Service.
February 21st, 2020 upped Section 1.1. Consideration of Spin Composition and Vector Notation, and revised Section 2.12. How to Handle Fore Front.
February 1st, 2020 upped Section 6.4. Consideration of Spin Composition and Vector Notation
December 2nd, 2019 revised to "Koma-san's Table Tennis is a Dynamics Ver. 2.0".
October 24th, 2018 revised 3.9 Law of Rotation Speed of Backspin Service, added <Break>Observe the Opponent.
October 2nd, 2018 added the global nav to each page.
September 10th, 2018 changed to HTML 5 & CSS 3 to support smartphones.
Jun 1th, 2018 revised 1.3. Effect of Rubber
Februaly 15th, 2018 upped Section 2.15. Ruturn by Converting to Drive or Cut from Clock or Cclock
and 3.11. Return Tcchiques to Drive or Cut from Clock or Cclock
November 21th, 2017 upped Section 6.3 Tactics against Inverted Rubber Service (Combination Rubber of Long-pips and Inverted)
and deleted My Associates Store.
November 6th, 2017 upped Section 6. Study and Solution. Resurrected Sections 1.13. Basic Directions of Return Shot
July 31th, 2017 upped Section 3 <Break> Basic Posture of Racket Swing
July 20th, 2017 revised 1.12. The Angular Momentum at Impact Point
July 3rd, 2017 upped 1.11. Relational Expression between Spin and Swing Speed, 3.9. Law of Speed of Backspin Service
revised 2.8. The Basic of Drive Spin Rallies
Jun 2nd, 2017 revised 1.9. Relation of Swing and Ball
March 16, 2017 deleted 3.9. Throw-up Service and Backspin
March 14, 2017 revised 3.9. Throw-up Service and Backspin
March 8, 2017 upped 3.9. Throw-up Service and Backspin
March 2, 2017 revised 1.6. Spin Speed and Swing Speed
Februaly 16, 2017 revised 5. Tactics agains Choppers
November 1, 2016 revised 1.12. Hitting Direction and Force Range
September 25, 2016 upped 2.14. Conterattack the Drive with Drive-based Spin
August 17, 2016 upped My Associates Store.
August 04, 2015 upped Part 5. Tactics agains Choppers.
July 23, 2015 upped 4.4. The Tactics against Pips-out Rubbers _ 4.8. The Tactics against the Combination of Long-pips and Sticky Rubbers
Jun 22, 2015 upped 4.2. Rubber Types and the Angle Momentum, 4.3. The Tactics against Long-pips Rubbers,
4.4. The Tactics against Pips-ourt Rubbers
May 25, 2015 upped 4.1. Rubber Characteristics and the Ball Trajecjtory
May 19, 2015 reviewed English Title, Introduction, Permission, 1.1.Movement of the Ball.
May 7, 2015 upped The English version to Web. Sections from 1 to 3.
October 2011 upped The Japanese version to Web.