code: function ParseJapaneseBasic (file, options) {
    var offset = 0
    var line = 1
    var column = 1
    var position
  
    if (!(this instanceof ParseJapaneseBasic)) {
      return new ParseJapaneseBasic(file, options)
    }
  
    if (file && file.message) {
      this.file = file
    } else {
      options = file
    }
  
    position = options && options.position
  
    if (position !== null && position !== undefined) {
      this.position = Boolean(position)
    }
  
    this.offset = offset
    this.line = line
    this.column = column
  }
docs: Transform Japanese natural language into
  an NLCST-tree.
  
  @param {VFile?} file - Virtual file.
  @param {Object?} options - Configuration.
  @constructor {ParseJapanese}