志水FC - SHIMIZU FC
In Kids Dream, this team played in the Shizuoka prefecture tournament (Captain Tsubasa, chapter 12, page 5).
Known match results and achievements
Victory against Itou (3109 days full record Data Book)
Victory 5-0 against Tsuda (Captain Tsubasa, chapter 12, page 14)
Defeat 0-3 against Nankatsu SC (Captain Tsubasa, chapter 15, pages 9-10)
Squad
Players

大林
Oobayashi
FW (n°11)
Oobayashi
FW (n°11)

加藤 和正
Kato Kazumasa
FW (n°9)
Kato Kazumasa
FW (n°9)

村上 幸司
Murakami Koji
MF (n°10)
Murakami Koji
MF (n°10)

高田 大輔
Takada Daisuke
MF (n°8)
Takada Daisuke
MF (n°8)

中尾 了太
Nakao Ryota
MF (n°7)
Nakao Ryota
MF (n°7)

飯村
Iimura
MF (n°6)
Iimura
MF (n°6)

鈴木
Suzuki
DF (n°5)
Suzuki
DF (n°5)

茨城
Ibaraki
DF (n°4)
Ibaraki
DF (n°4)

神田 一郎
Kanda Ichiro
DF (n°3)
Kanda Ichiro
DF (n°3)

工藤
Kudo
DF (n°2)
Kudo
DF (n°2)

川上 守道
Kawakami
Morimichi
GK (n°1, captain)
Kawakami
Morimichi
GK (n°1, captain)
Staff

石井 学
Ishii Manabu
Head coach
Ishii Manabu
Head coach
Playstyle
Abilities
Their players are almost as good individually as Nankatsu SC's players (Captain Tsubasa arc, chapter 12, page 5). The number of goals scored and taken in 7 matches are also similar to Nankatsu SC, suggesting that they have about the same strength (Captain Tsubasa arc, chapter 14, pages 7-8).
Offense
Despite not having an ace striker like Tsubasa, their offense is said to be as good as Nankatsu SC (Captain Tsubasa arc, chapter 14, page 26). They can charge collectively the keeper to destroy him (Captain Tsubasa arc, chapter 14, pages 34 to 37).
Passing
Their passwork is good, worthy of a final (Captain Tsubasa arc, chapter 14, page 11). They can attack slowly with passes, to destabilize the opponent's defense (Captain Tsubasa arc, chapter 14, page 33).
Other informations
The Data book is wrongly giving the jersey n°6 to Takada Daisuke while he's clearly seen with the n°8 in the manga (Captain Tsubasa arc, chapter 14, page 14).
The Data book isn't giving the n°10 to anyone while a n°10 is clearly seen in the manga (Captain Tsubasa arc, chapter 14, page 5). No n°14 is seen though, so the n°14 is most likely the n°10.
The Data book is probably giving the wrong portrait for Kanda Ichiro as the player named like that in the manga isn't looking like that at all (Captain Tsubasa arc, chapter 14, page 11).
The portraits I've put for n° 6, 5, 4 and 2 aren't a 100% certainty. Just guesses from some manga pictures that may be far-fetched.