Study the stroke order for writing kanji. These rules came from China, and there are exceptions. Basic rules include the following: Draw characters from left to right, and from top to bottom, starting at the top left of the character; draw horizontal strokes from left to right and draw vertical strokes from top to bottom; and when two non-diagonal strokes cross, draw the horizontal one first. A rule for a character with a border of lines, which makes a box around the rest of the character, includes the following: Draw the left, then the top and right strokes of the border, then draw the middle of the character. Save the bottom border stroke for last. Other basic rules include: Draw diagonal strokes that lean to the right before ones that lean to the left; when a diagonal stroke leaning to the right and a horizontal stroke cross, draw the diagonal stroke first; and when a vertical stroke is flanked by one or more small strokes on its sides, draw the vertical stroke first, then the small strokes, proceeding left to right and top to bottom.
Find the kanji characters for Fujita. The most common characters used for writing "Fujita" are the character used to write "wisteria", or "fuji," and the character used to write "field", or "ta."
Practice writing the characters for "Fujita" with your finger in the air or on a surface and practice writing the characters with pencil and paper. This is to help in memorizing the stroke order and the nuances of the arrangement of the characters' parts.
Study the various types of Japanese calligraphy, or sosho, which is also heavily sourced from Chinese calligraphy. Find which styles appeal to you the most, and with the ink and paint brush practice them, or use the styles as inspiration to make your own style.