tweak doc
diff --git a/Documentation/Changelog.md b/doc/changelog.md
similarity index 99%
rename from Documentation/Changelog.md
rename to doc/changelog.md
index 9ed9393..c329558 100644
--- a/Documentation/Changelog.md
+++ b/doc/changelog.md
@@ -1,4 +1,5 @@
-## History
+# History
+
 * 2022/Apr/05 ver 6.04 add tpause, umonitor, umwait
 * 2022/Mar/08 ver 6.03 MmapAllocator supports memfd with user-defined strings.
 * 2022/Jan/28 ver 6.02 strict check the range of 32-bit dispacement
@@ -171,4 +172,4 @@
 * 2007/Nov/2  support SSSE3/SSE4 (thanks to Dango-Chu san)
 * 2007/Feb/4  fix the bug that exception doesn't occur under the condition which the offset of jmp mnemonic without T_NEAR is over 127.
 * 2007/Jan/21 fix the bug to create address like [disp] select smaller representation for mov (eax|ax|al, [disp])
-* 2007/Jan/4  first version
\ No newline at end of file
+* 2007/Jan/4  first version
diff --git a/Documentation/Install.md b/doc/install.md
similarity index 94%
rename from Documentation/Install.md
rename to doc/install.md
index 9bc7303..ddc1a10 100644
--- a/Documentation/Install.md
+++ b/doc/install.md
@@ -1,4 +1,4 @@
-## Install
+# Install
 
 The following files are necessary. Please add the path to your compile directory.
 
@@ -11,4 +11,4 @@
 make install
 ```
 
-These files are copied into `/usr/local/include/xbyak`.
\ No newline at end of file
+These files are copied into `/usr/local/include/xbyak`.
diff --git a/Documentation/Usage.md b/doc/usage.md
similarity index 99%
rename from Documentation/Usage.md
rename to doc/usage.md
index 35f48e8..7dad245 100644
--- a/Documentation/Usage.md
+++ b/doc/usage.md
@@ -1,3 +1,5 @@
+# Usage
+
 Inherit `Xbyak::CodeGenerator` class and make the class method.
 ```
 #include <xbyak/xbyak.h>
@@ -404,4 +406,4 @@
 * [test0.cpp](../sample/test0.cpp) ; tiny sample (x86, x64)
 * [quantize.cpp](../sample/quantize.cpp) ; JIT optimized quantization by fast division (x86 only)
 * [calc.cpp](../sample/calc.cpp) ; assemble and estimate a given polynomial (x86, x64)
-* [bf.cpp](../sample/bf.cpp) ; JIT brainfuck (x86, x64)
\ No newline at end of file
+* [bf.cpp](../sample/bf.cpp) ; JIT brainfuck (x86, x64)
diff --git a/readme.md b/readme.md
index e1f2ebf..3853535 100644
--- a/readme.md
+++ b/readme.md
@@ -1,23 +1,13 @@
 
-# Xbyak ![Badge Version] [![Badge License]][License] [![Badge Build]][Build Status]
+# Xbyak 6.0.4 ; ?[![Badge Build]][Build Status]
 
-*A C++ JIT assembler for `x86 (IA32)` , `x64(AMD64,x86-64)`*
+*A C++ assembler for x86 (IA32), x64 (AMD64, x86-64)*
 
-<br>
+## Menu
 
----
-
-<div align = 'center'>
-
-**⸢ [Install] ⸥**  
-**⸢ [Usage] ⸥**  
-**⸢ [Changelog] ⸥**
-
-</div>
-
----
-
-<br>
+- [Install]
+- [Usage]
+- [Changelog]
 
 ## Abstract
 
@@ -26,20 +16,16 @@
 The pronunciation of Xbyak is `kəi-bja-k`.
 It is named from a Japanese word [開闢](https://translate.google.com/?hl=ja&sl=ja&tl=en&text=%E9%96%8B%E9%97%A2&op=translate), which means the beginning of the world.
 
-<br>
-
 ## Feature
 
-* header file only
-* Intel/MASM like syntax
-* fully support AVX-512
+- header file only
+- Intel/MASM like syntax
+- fully support AVX-512
 
 **Note**:
 Use `and_()`, `or_()`, ... instead of `and()`, `or()`.
 If you want to use them, then specify `-fno-operator-names` option to gcc/clang.
 
-<br>
-
 ### News
 
 - WAITPKG instructions (tpause, umonitor, umwait) are supported.
@@ -53,40 +39,37 @@
 - support exception-less mode see. [Exception-less mode](#exception-less-mode)
 - `XBYAK_USE_MMAP_ALLOCATOR` will be defined on Linux/macOS unless `XBYAK_DONT_USE_MMAP_ALLOCATOR` is defined.
 
-<br>
-
 ### Supported OS
 
-- **Windows** ( `Xp` , `Vista` , `7` , `10` *32 / 64 bit* )
-- **MacOS** ( *Intel* )
-- **Linux** ( *32 / 64 bit* )
-
-<br>
+- Windows (Xp, Vista, 7, 10, 11) (32 / 64 bit)
+- Linux (32 / 64 bit)
+- macOS (Intel CPU)
 
 ### Supported Compilers
 
 Almost C++03 or later compilers for x86/x64 such as Visual Studio, g++, clang++, Intel C++ compiler and g++ on mingw/cygwin.
 
-<br>
+## License
+
+modified new BSD License
+http://opensource.org/licenses/BSD-3-Clause
 
 ## Author
 
 #### 光成滋生 Mitsunari Shigeo
- **[Github]** | **[Website]** | [herumi@nifty.com](mailto:herumi@nifty.com)
+ [GitHub](https//github.com/herumi | [Website (Japanese)](http://herumi.in.coocan.jp/) | [herumi@nifty.com](mailto:herumi@nifty.com)
+
+## Sponsors welcome
+[GitHub Sponsor](https://github.com/sponsors/herumi)
 
 <!----------------------------------------------------------------------------->
 
-[Badge License]: https://img.shields.io/badge/License-BSD_3--Clause-blue.svg
-[Badge Version]: https://img.shields.io/badge/Version_6.04-00B2FF
 [Badge Build]: https://github.com/herumi/xbyak/actions/workflows/main.yml/badge.svg
+[Build Status]: https://github.com/herumi/xbyak/actions/workflows/main.yml
 
 [License]: COPYRIGHT
 
-[Changelog]: Documentation/Changelog.md
-[Install]: Documentation/Install.md
-[Usage]: Documentation/Usage.md
+[Changelog]: doc/changelog.md
+[Install]: doc/install.md
+[Usage]: doc/usage.md
 
-[Build Status]: https://github.com/herumi/xbyak/actions/workflows/main.yml
-
-[Website]: http://herumi.in.coocan.jp/
-[Github]: https://github.com/herumi