石 is the character that means rock or stone in both Chinese and Japanese.

Alone, this will be read as “stone” in Japanese but in some context, it is a unit of measure for the volume of about five bushels.

This can also refer to a gem or jewel.

This can also be the Japanese surnames that romanize as Ishi, Tsuruishi, Soku, Seki, Shi, Kazu, Iso, Ishizaki, Ishisaki, or Koku.

砂 means sand or gravel in Chinese, Japanese Kanji, and old Korean Hanja.

The radicals in the character imply the grit from ground-down stone or rock.

This can also be the Japanese surname Sunahama.

ジブラルタル is the name Gibraltar in Japanese Katakana.

This is also used in Japan to refer to the Rock or Strait of Gibraltar.

Note: Because this title is entirely Japanese Katakana, it should be written by a Japanese calligrapher.

岩 is a Chinese, Japanese, and old Korean word that means cliff, rock, boulder, or anchor.

This Kanji can also be Japanese surnames that romanize as Iwayanagi, Iwahama, Iwazagi, Iwazaki, Iwasaki, Iwagazaki, Iwao, Iwa, or Iiwasaki.

鉄心石腸 is a Japanese proverb that suggests you should have the inner-strength and will as hard and steadfast as iron.

It's the Japanese way of saying, “stay strong.” This is an especially uplifting thing to say to a person in distress or recovering from a disaster. It's kind of the survivor's creed.

If you literally translate this, it means “iron will, stone guts” or “iron heart, rock-hard bowels.”